Correct Answer : Both (A) and (B)
Explanation : Both Ad Revenue and In-App Purchase can monetize a free app.
Correct Answer : All of the above
Explanation : All of the above options are responsible for a successful PPC advertisement.
Correct Answer : QS * Max CPC (bid)
Explanation : Google uses QS * Max CPC (bid) formula for assessing the actual CPC as when an advertisement gets clicked.
Correct Answer : Advertising cost ($) / Ads clicked (#)
Explanation : The basic formula of pay-per-click is Advertising cost ($) / Ads clicked (#).