All of the following are true regarding stones in the common bile duct, except-

• A. ERCP,sphincterotomy and balloon clearance is now the standard treatment
• B. When removed by exploration of the common bile ducts the T-tube can be removed after 3 days
• C. Can present with charcot's triad
• D. Are suggested by a bile duct diameter > 6 mm of ultrasound