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# Make 24.
In each of the following, use each number once and exactly once (if repeated twice, then use it exactly twice, and so on), and some of the operations $+,-,\times,\div$ and parentheses (you may repeat the operations), to make the number 24.
(A) 5, 5, 10, 10
(B) 3, 3, 9, 9
(C) 2, 5, 5, 10
(D) 1, 5, 7, 10
These are all possible (some may be in multiple ways).