Answer:
The correct answer is letter "A": full-service agencies.
Step-by-step explanation:
Full-service agencies are those in charge of handling all the advertisement campaign of a company from the planning until it is implemented. In most cases, firms hire these agencies to focus on their production process instead of the branding and promotional efforts for the goods manufactured. In some cases, the payment of these agencies can be set as a percentage of certain goals dealt with the institution.