Why Were Wegener's Continental Drift Ideas Rejected by Many Contemporary

Why were Wegener's continental drift ideas rejected by many contemporary and later scientists?

A) The ocean basins were well known to be geologically young, Mesozoic and Cenozoic features.
B) His drift mechanism seemed impossible on the basis of known physical processes.
C) Land bridges were proven to have aided in animal and plant migrations.
D) The gravitational attractions of the Sun and Moon were not strong enough to move the continents from the southern to the northern hemisphere.