In what way do the leading causes of death in the United States in the early 1900s compare with those today?
A. In the early 1900s, the leading causes of death were largely infectious; today, behavioral factors play a bigger role.
B. As in the early 1900s, infectious diseases represent the leading causes of death in the United States today.
C. In the early 1900s, behavioral factors played a large part in the leading causes of death, just as they do today.
D. Behavioral factors contributed substantially to the leading causes of death in the early 1900s. Today, infectious diseases are the main causes of death.
Answer: A
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