Which loop (while, do-while, or for) is best to use in the following situations?
A) The user must enter a set of exactly 14 numbers.
B) A menu must be displayed for the user to make a selection.
C) A calculation must be made an unknown number of times (maybe even no times).
D) A series of numbers must be entered by the user, terminated by a sentinel value.
E) A series of values must be entered. The user specifies exactly how many.
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