The Equestrian Order (Roman Knights)was Established By

The equestrian order (Roman knights) was established by:

A) plebeians who complained of limited opportunities for social advancement.
B) the army which wanted to ensure a steady supply of cavalry officers.
C) soldiers who demanded recognition for bold deeds in warfare.
D) men whose wealth made it possible for them to own and equip warhorses.
E) some patricians who wanted to take part in triumphal processions in Rome.