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?

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? 

A) Bid accross multiple ad groups to determine the average
B) Use bid simultors to see CPC estimates 
C) Try various CPC amounts to determine the average
D) Raise your max. CPC to US$3 to cover possible competitive bids