Problems Stem from Which Two Primary Sources

Problems stem from which two primary sources?

A) gaps between what is supposed to happen and what did happen, and gaps between what is supposed to happen and what happened in the past
B) gaps between what is supposed to happen and what did happen, and gaps between what did happen and what could have happened
C) gaps between what is happening now and what happened prior to the present
D) gaps between what management desires and what stockholders desire
E) gaps between what present consumers desire and what potential consumers desire