An Abdominal CT Scan Done to Evaluate a Hepatic Mass

An abdominal CT scan done to evaluate a hepatic mass seen on ultrasonography:

A) is unlikely to provide a more definitive diagnosis than sonography.
B) should always be done instead of MRI for hepatic mass characterization.
C) is a multiphase study without and with IV contrast enhancement and with delayed scanning.
D) must be done with the injection protocol for CT arteriography.