Which of the following statements regarding sex ratios is TRUE?
A) Sex ratios remain constant over time.
B) The ratio of males to females at birth is skewed slightly toward females.
C) Fewer females tend to survive to reproductive age, and the sex ratio of males to females during adolescence is about 1:1.
D) The ratio of males to females at age 90 or older to about 1.5:1.
E) Sex ratios are dynamic and can change over time; the ratio of males to females at birth may be different from that during adolescence and adulthood.
Correct Answer:
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