Mike often hides . . . . . . . . that tree. A. above B. behind C. in D. None of the above

The correct answer is C. in.

Mike often hides in that tree. This means that he goes inside the tree to hide. The other options are not correct because they do not describe where Mike hides. Option A, above, is not correct because Mike does not hide on top of the tree. Option B, behind, is not correct because Mike does not hide behind the tree. Option D, none of the above, is not correct because one of the options is correct.