Which Groups of People Were Referred to as "Red-Diaper Babies

Which groups of people were referred to as "red-diaper babies" by commentators in the 1960s?

A) College radicals who were the children of radicals
B) Republicans whose parents were communists
C) Democrats who opposed the use of force in all circumstances
D) High school students who supported the war in Vietnam
E) Newspaper editors who were critical of Richard Nixon