How Did the State of Battlefield Medical Care Affect Soldiers

How did the state of battlefield medical care affect soldiers during World War I?

A) Vaccinations dramatically reduced deaths that were due to disease.
B) Battlefield psychologists helped prevent widespread incidence of post-traumatic stress disorder.
C) Antibiotic shots eliminated amputations due to trench foot.
D) Failure to develop effective antiseptics meant that serious wounds were a near-certain death sentence.
E) The absence of anesthesia supplies required surgeons to operate on patients who were fully awake.