Which of the Following Statements About Marketing Audits Is True

Which of the following statements about marketing audits is true?

A) Marketing audits only need to be performed once.
B) The main purpose of the marketing audit is to develop a full profile of a company's marketing effort.
C) Marketing audits should only be performed after a major crisis.
D) Marketing audits simply examine the external environment in which a company operates.
E) The marketing audit should only be performed by outside accounting firms