A mitral insufficiency/regurgitation murmur is classified as:

A. A flat murmur does not accurately describe the type of murmur associated with mitral insufficiency. B. Mitral insufficiency is typically classified as a systolic murmur, not diastolic. C. An absent murmur would indicate no audible sound, which is not applicable here. D. Mitral insufficiency or regurgitation is characterized by a systolic murmur due to the backflow of blood from the left ventricle into the left atrium during systole.