Final answer:
c. 6,000. here are approximately 6,000 ad agencies operating in the US.
Step-by-step explanation:
The correct answer is c. 6,000 ad agencies operating in the US.
Ad agencies, also known as advertising agencies, are companies that provide services such as creating, planning, and managing advertising campaigns for clients. They help businesses promote their products or services through various forms of media.
Estimating the exact number of ad agencies operating in the US can be difficult, as new agencies are constantly being formed and some agencies may have ceased operations. However, based on industry research and estimates, it is believed that there are approximately 6,000 ad agencies in the US.