Jim Is Suffering from Congestive Heart Failure, in Which Blood

Jim is suffering from congestive heart failure, in which blood flow is backed up in his lungs and excess fluid is escaping the blood and accumulating in his lung tissue.If untreated, increasing pulmonary edema will lead to death by suffocation.What is the most-likely cause of Jim's congestive heart failure?

A) Contraction of his right atrium is not keeping up with contraction of his left atrium.
B) Contraction of his left ventricle is not keeping up with contraction of his right ventricle.
C) Jim's pulmonary semilunar valve is not opening properly.
D) Jim's SA node is malfunctioning.