Final answer:
The tools below can help the advertiser to use would be AdWords Editor (Option A).
Step-by-step explanation:
AdWords Editor is a free, downloadable application that allows advertisers to make bulk changes to their ad campaigns, saving time and effort. With AdWords Editor, advertisers can make changes offline and then upload them in bulk to their AdWords accounts.
Additionally, the AdWords Application Programming Interface (API) is a powerful tool for advertisers who want to integrate AdWords data and functionality into their own systems. The API allows advertisers to automate tasks, access performance data, and manage their campaigns programmatically.
Lastly, AdWords My Client Center (MCC) is ideal for advertisers who manage multiple AdWords accounts. MCC allows advertisers to view and manage all their accounts from a single dashboard, making it easier to monitor and optimize campaigns across different clients or campaigns.
Thus, the correct option is A.
Your question is incomplete, but most probably your full question was
Which would be the most efficient tool for that advertiser to use?
A. AdWords Editor,
B. The AdWords Application Programming Interface (API),
C. AdWords My Client Center (MCC),
D. Adwords Value Track