Question

What is the difference between a pop-up and pop-under ad?
A.A pop-up ad appears quickly when you open a Web site; it may be sometime before you see a pop-under ad
B.A pop-up ad uses a separate window; a pop-under ad does not
C.A pop-up ad is a click-and-order ad; a pop-under ad is considered a click through ad
D.A pop-under ad is a type of SpyWare; a pop-up ad is not

Answer

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