Company a Used to Rely on Outside Advertising Agencies for Its

Company A used to rely on outside advertising agencies for its advertising needs but since it is a global company,it is now worried that using external agencies may lead to non-consistency of its brand image.The years on experience with outside agencies has made it realize that it results in wastage of both time and money.It also wants to maintain tighter control over its advertising and promotion activities.Which of the following advertising agencies should it adopt?

A) Collateral service agency
B) Full service agency
C) In-house agency
D) Democratic agency
E) Creative boutique