You have a budget of us$75 per day for your client’s search campaign, and you’d like to set a maximum cost-per-click (max. cpc) bid of us$1. how can you validate that this is the right bid amount for getting the most clicks? '

Use bid simulators to see CPC estimates

Explanation:

When you know your daily budget and desired max cpc, you can use bid simulators to see CPC estimates and validate that this is the right bid amount for getting the most clicks.  Google Ads bid simulators help you see how different bids might change your ads’ weekly performance. The bid simulators collect and analyze data from ad auctions on the Search Network and the Display Network while considering information such as Quality Score, keyword traffic, and competition in the ad auction. The tools use this information to estimate how your ads might have performed in terms of key metrics like cost, impressions, clicks, and conversion volume.

i think the answer to your question is b. directive