Which of the Following Best Characterizes Twins in Late Adulthood

Which of the following best characterizes twins in late adulthood?

A) They usually would have lost touch with each other if they had established families and children of their own.
B) They are less close than non-twin siblings at this time.
C) They have more frequent contacts and greater emotional closeness than when they were in middle adulthood.
D) They experience little difference in their emotional bonds compared to other nurtured loving sibling relationships.