Embryological support for evolution was disapproved by Karl Ernst von Baer.

To elaborate, Karl Ernst von Baer, a pioneering embryologist, analyzed the development stages of embryos and pointed out that embryos of different species do not resemble each other as closely as was previously thought, especially in their early stages. His observations indicated that while there may be superficial similarities in the embryonic stages of different species, these similarities do not necessarily support a common ancestry. This contradicted earlier notions that embryological development could provide strong evidence for evolution.

Therefore, the correct answer is:

Option C: Karl Ernst von Baer