When Rovee-Collier and Her Colleagues Attached a Ribbon from a Mobile

When Rovee-Collier and her colleagues attached a ribbon from a mobile to 2- to 3-month-old infants' legs so that the infants learned to kick to make the mobile move, they found that when they returned to the babies' homes several days later the babies

A) had forgotten that kicking made the mobile move.
B) would still kick to make the mobile move.
C) had lost interest in the mobile.
D) would cry when they saw the mobile.