PTSD in Female Veterans
Post-traumatic stress disorder (PTSD) is a severe anxiety disorder that affects millions of people around the world. Individuals can develop PTSD after experiencing any event that results in psychological trauma. Symptoms of PTSD involve flashbacks to the traumatic event, nightmares, obsessive behavior, anger, insomnia, difficulty concentrating, and hypervigilance. Individuals who suffer from PTSD can experience significant difficulties in social relationships, have lower self-esteem, and have trouble maintaining employment. People with PTSD experience a higher risk of committing suicide and developing a substance abuse disorder. Although PTSD can affect any individual, military veterans are especially susceptible. Furthermore, within this population, women are more than twice as likely as men to develop PTSD.
Although studies investigating precisely why women are more likely than men to experience PTSD have not yet been completed, some experts have theorized that low unit cohesion is a major factor. Unit cohesion, defined as the mutual bonds of friendship and support among members of a military unit, is thought to be helpful in reducing the incidence of developing PTSD. Women are more likely than men to experience low unit cohesion for a variety of reasons. One of the most obvious factors is the relative lack of females in the military; currently, women make up only 20% of the armed forces. Pervasive male prejudice against women is another factor that can diminish unit cohesion for female soldiers.
Perhaps the biggest impediment to achieving quality treatment for women suffering from wartime PTSD is a shortage of research. While both the VA and independent agencies have completed hundreds of studies researching the prevention of and treatment for PTSD amongst general military populations, there have been no studies completed that solely target women. More must be done to help women who have sacrificed so much for their country.
Question: What is the best summary of this passage?

Question

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This answer choice best sums up the passage.
PTSD is a severe anxiety disorder that affects combat veterans in particular. Symptoms include flashbacks, nightmares, anger, and insomnia just to name a few is incorrect. This answer choice only defines PTSD and gives a few symptoms. The main point of the passage-the fact that PTSD disproportionately affects women-is not even mentioned.
A big problem facing women with PTSD is that there haven't been any research studies specifically targeting female combat veterans. More must be done to help these women is incorrect. While this is a key point of the passage, it is not a good overall summary. This answer choice does not mention the definition of PTSD nor does it talk about the problems that women face in the military.
PTSD affects female combat veterans more than it affects male combat veterans. Studies done solely on female combat veterans have shown that the single most important factor causing this is the quality of treatment for women suffering from wartime PTSD is incorrect. This answer choice contains incorrect information. Actually, the author states that there have NOT been any studies done solely on women and indeed, that is the problem.