(A) towards the wall at its upper end
(B) away from the wall at its upper end
(C) upwards at its upper end
(D) downwards at its upper end
(E) none of the above
(A) towards the wall at its upper end
(B) away from the wall at its upper end
(C) upwards at its upper end
(D) downwards at its upper end
(E) none of the above
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