How might you explain to an account manager why se should identify how much a conversion costs when setting up conversion tracking for a client‟s Search Network campaign?

How might you explain to an account manager why se should identify how much a conversion costs when setting up conversion tracking for a client‟s Search Network campaign?

A) Cost-per-conversion data can be compared with competitors cost-per-conversion data
B) Knowing the cost-per-conversion can help her better optimize the campaign’s bids and budgets 
C) Cost-per-conversion data can indicate whether her profit will increase
D) Knowing the cost-per-conversion can help her better optimize the campaign‟s keywords