A) An opposing or retaliatory measure
B) An episode title of [C.S.I.] Miami.
C) Deploying flares, [ECM Hammer], or a smoke screen on Battlefield 3
D) The act of measuring ones penile length upon a countertop or table.
E) A 1998 film starring Michael Dudikoff
* These videos are coming directly from Youtube, they may or may not be most relevant to the word "Countermeasures"