Most scientists in wegeners day rejected his hypothesis on continental drift because he could not explain

Option (B)

Explanation:

The continental drifting refers to the shifting of the continents over the large oceanic body with respect to the poles of both the hemisphere. Alfred Wegener was the person which proposed this theory. He gave many evidences in support of this theory such as the fitting of the continental margins, presence of similar fossils in the separated continents, similar rock sequences present in the different continents. These evidences were helpful up to certain extent, but he was unable to explain the main mechanism behind this plate motion.

This is why his theory was not accepted by many scientists.

Thus, the correct answer is option (B).

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