If A + B means A is the brother of B; A - B means A is the sister of B; and A x B means A is the father of B. Which of the following means that C is the son of M?
Explanation:
In option D, M x N means M is the father of N. N - C means N is the sister of C, so M is also the father of C. C + F means C is the brother of F, which establishes that C is male. Therefore, C is the son of M.
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