Which of the Following Is Accurate in the Context of Account

Which of the following is accurate in the context of account planning?

A) Agencies that implement it tend to do more quantitative and statistical research than their more traditional counterparts.
B) Its cost is less than that of relying on secondary sources.
C) Account planners are being appointed in place of account executive to work on each client's business.
D) By implementing it, agencies put research in a more prominent role in the advertising process.