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