Identify the Letter of the Choice That Best Matches the Phrase

Identify the letter of the choice that best matches the phrase or definition.
-New window that opens behind the current one with an advertisement that isn't noticed until the front window is closed

A) expanding
B) interstitial
C) pop-under
D) floating
E) digital certificate
F) pop-up
G) encryption
H) banner
I) electronic cash (e-cash)
J) smart cards
K) video ad
L) trick banner