Mark the correct alternative in each of the following questions. For some integer \( m \), every...

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Mark the correct alternative in each of the following questions.
For some integer \( m \), every even integer is of the form
(a) \( m \)
(b) \( m+1 \)
(c) \( 2 m \)
(d) \( 2 m+1 \)
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