The Largest Single Type of Day Care Arrangement in the U.S

The largest single type of day care arrangement in the U.S. today is

A) the organized child care facility, such as a group day care center or nursery school.
B) care by a grandparent in the child's own home.
C) care in the home of a grandparent or other relative.
D) care by the child's own mother at her place of employment.