Question

An increase in cases of retinopathy of prematurity (ROP) occurred in the 1950s
A) due to a rubella epidemic across the country.
B) when new medical advances were implemented that provided extra oxygen to premature infants.
C) as veterans of World War II developed long-term side effects of their exposure to chemical agents.
D) as pregnant women tried a new drug to decrease their symptoms of morning sickness.

Answer

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