In Cases of Domestic Violence,such as a Riot Within a State,the

In cases of domestic violence,such as a riot within a state,the national government has the right to intervene

A) only when Congress authorizes the intervention.
B) only when the state's governor requests help.
C) only when the state's legislature requests help.
D) even if there is no request for help from any state authority.
E) only when the Supreme Court approves an interstate compact.