Correct Answer: D
Explanation:
‘however’ indicates a contradictory statement, and therefore we need opposite ideas in the two halves of the sentence.
So, Wegener’s theory is unchallenged(everyone accepts it); however he was treated with disdain (contempt).
Also the word ‘outsider’ in the sentence indicates that the second blank will have to be a negative word.
(approbation = approval; reverence = respect)