Which of the Following Statements Is True About Agency Commissions

Which of the following statements is true about agency commissions?

A) Some leading agencies now receive average commissions of 8 to 10 percent.
B) Nearly all of the leading agencies still earn a 15 percent commission.
C) Most agencies are earning more of their income from fixed commissions as clients expand their IMC programs to include other forms of promotion.
D) Most agencies are unwilling to negotiate their commission rates.
E) Leading agencies often get 20 percent commissions.