According to the Text, One Reason That Studies Show That

According to the text, one reason that studies show that the costs of children outweigh the benefits is:

A) the rewards are more subjective and difficult to measure.
B) opportunity costs remain higher than the rewards.
C) having children tends to isolate parents rather than connecting them with others.
D) the research does not follow people over time.
E) more research is done with women than with men.