Not until age _____ are children certain that a video image of themselves replayed a few minutes after it was filmed is still "me."

The ______secrete hormones that traditionally have been classified as masculine or feminine

a. kidneys c. adrenal glands b. gonads d. endocrine glands

The tendency to start smoking occurs almost exclusively during the ________ years

a. late adulthood b. middle adulthood c. adolescent d. early childhood