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All of Kay’s brothers can swim.
If the statement above is true, which of the following
must also be true?
(A) If Fred cannot swim, then he is not Kay’s brother.
(B) If Dave can swim, then he is not Kay’s brother.
(C) If Walt can swim, then he is Kay’s brother.
(D) If Pete is Kay’s brother, then he cannot swim.
(E) If Mark is not Kay’s brother, then he cannot swim.
What is "A" ?