Why Might Proposal Revisions Be Required

Why might proposal revisions be required?

A) The review process may reveal unreasonable impact on one area of the institution, since other research is in progress; a change of venue could be indicated.
B) Funding becomes unavailable and the proposal must be revised, in accordance with cuts.
C) Several potential subjects refuse to participate in the research study.
D) The study methodology is weak, and the reviewers' suggestions will improve the strength of the methodology.
E) The researcher has inadvertently submitted materials that contain errors.