Critical thinking question

A publisher produces magazines, all of which have a number of pages which is a multiple of 32. Thus, a magazine can have 32, 64, 96… pages. The front cover is always counted as page 1.
The centre spread of the magazine could have pages numbered
A 15 and 16.
B 30 and 31.
C 50 and 51.
D 63 and 64.
E 96 and 97.

Kindly also specify the reason of the chosen answer.

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