Which Statement Is FALSE About Carotid Stenoses

Which statement is FALSE about carotid stenoses?

A) in a patient with an anterior circulation ischemic event, the presence of a bruit suggests a moderately severe stenosis
B) in a patient with an anterior circulation ischemic event, the absence of a bruit dismisses a moderately severe stenosis
C) a symptomatic stenosis >70% is often operated upon
D) an asymptomatic stenosis of > 70% is usually not operated upon
E) all patient with stenoses < 30% should not be considered for endarterectomy