Which of the following statements about sibling relationships in middle adulthood is true?

A) As siblings grow older, good relationships often get worse and poor relationships get better.
B) Baby-boom brothers are not as warm and expressive in middle age as those of the preceding cohort.
C) Despite reduced contact, many siblings feel closer in midlife, often in response to major life events.
D) In industrialized nations, sibling relationships are generally involuntary.

C