Which of the Following Statements Holds True for the Term

Which of the following statements holds true for the term click-through rate?

A) It refers to the ad rates quoted in cost per thousand impressions.
B) It refers to the number of users who clicked an ad divided by the number of times the ad was delivered.
C) It refers to the maximum amount of money an advertiser is willing to pay for each click on their ad.
D) It refers to the cost an advertiser is willing to bear for a particular amount of time a surfer spends on an ad.
E) It refers to a method of charging for advertising whenever a user performs a specified action such as signing up for a service, requesting material, or making a purchase.