The most rapid increases in average longevity at birth occurred in the first half of the 20th century largely due to
a. a reduction in maternal smoking.
b. an increase in maternal mortality.
c. declines in infant mortality rates.
d. lack of access to childhood immunizations.
ANSWER: c
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a. traditional gender roles in U.S. society. b. the conflict model of gender roles. c. second-wave feminism. d. a balance of economic and other forms of power.
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