SAT Logic

X is a subset of Y and Y is a subset of Z. Which of the following statements must be true?

(A)\(\ \ \) If 1 is in Y, then 1 is in X.
(B)\(\ \ \) If 2 is in Z, then 2 is in X.
(C)\(\ \ \) If 3 is in Z, then 3 is in Y.
(D)\(\ \ \) If 4 is in X, then 4 is in Z.
(E)\(\ \ \) None of the above.

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