ANSI C supports 3 types of loops. Which of the following is NOT a valid keyword used in coding loops in C?

A: while

B: do

C: until

D: for

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Assuming that the value of the variable Stage is not changed in the body of the loop below, how many times will the body of the loop execute? for(Stage = 0; Stage <= 3; ++Stage)

A: 0

B: 3

C: 4

D: This is an endless loop