I think it's b because "end application" would make the most sence
a form of semiconductor diode in which at a critical reverse voltage a large reverse current can flow.
There's no "using namespace std;" statement. I see no reason for COLOR to be two dimensional or have a length of 5 with only four elements. The inside of the for loop with variable 'J' makes no sense.
B.Merriam-Webster's collegiate dictionary (10th ed.). (1993). Springfield, MA: Merriam-Webster.
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