Which of the Following Statements Regarding the Relationship Between Advertising

Which of the following statements regarding the relationship between advertising and promotion,and sales performance is true?

A) In mature markets where other marketing mix variables are stable,it is impossible to determine the relationship between advertising and/or sales promotion and sales.
B) The repositioning of brands is often done with a goal of improving sales or market share.
C) When sales expectations are not being met,experienced managers are not very likely to consider changes in their advertising and sales promotion programs.
D) Marketing and brand managers are often under pressure to show sales results and thus may take long-term perspective in evaluating advertising and promotion programs.
E) All of the above statements regarding the relationship between advertising and promotion and sales performance are true.