What is the best explanation for young infants' ability to recognize their mother's voices shortly after birth?

Prosocial behavior that is truly ________ is motivated by a desire to help others and requires clear self-sacrifice

Fill in the blank with the appropriate word.

Which of the following statements about divorce in late adulthood is true?

A) Less than 1 percent of all U.S. divorces involve couples over age 65. B) The divorce rate among people 65 and older has decreased over the past three decades. C) About half of older adults' dissolving marriages are lengthy—30 years or more. D) Compared with younger adults, seniors are less likely to experience a sense of personal failure following divorce.