Question

during world war i, many soldiers died because their wounds became infected. antibiotics had not been discovered at that time. during world war ii, many more soldiers died while in combat. antibiotics are used to treat infections because they kill bacteria in the body. they are easily the most widely prescribed drug in the world.
what is this passage mostly about?
a. antibiotics
b. world war i
c. soldiers
d. bacteria

Explanation:

The passage begins by discussing the deaths of soldiers during World War I due to infected wounds (as antibiotics hadn't been discovered then). It then contrasts this with World War II, where antibiotics were used to treat infections (by killing bacteria in the body). The final sentence mentions that antibiotics are "easily the most widely prescribed drug in the world". So, the main focus throughout the passage is on antibiotics - their non - existence in World War I, their use in World War II, and their current widespread prescription.

Answer:

A. antibiotics