162. Concerned at the increase in accident fatalities,

LACE w:st="on">TennesseeLACE> adopted a child-passenger protection law requiring the parents of children under four years of age to be restrained in a child safety seat.

(A) the parents of children under four years of age to be restrained in a child safety seat

(B) the restraint of parents of children under four years of age in a child safety seat

(C) that parents restrain children under four years of age in a child safety seat

(D) that children be restrained under four years of age in a child safety seat by their parents

(E) children to be restrained under four years of age by their parents in a child safety seat

请问D哪里错了？