Final answer:
Alfred Wegener provided evidence for continental drift through similar fossils found on different continents, the idea of a supercontinent called Pangaea, and geological and botanical similarities across oceans. Skepticism prevailed due to the lack of a mechanism, which was later solved by plate tectonics theory. The correct option is c. similar fossils were found on different continents.
Step-by-step explanation:
The evidence that helped Alfred Wegener develop the theory of continental drift includes notably the similarity of fossil records across different continents, particularly between South America and Africa. Wegener's hypothesis proposed that these separated lands were once united in a supercontinent called Pangaea.
In addition to fossils, Wegener cited the complementary shapes of continents, as well as botanical and geological similarities, including matching mountain ranges and evidence of past climates, as proof of his theory. However, Wegener's lack of a mechanism for how continents moved led to skepticism from the scientific community until the later development of plate tectonics provided an explanation and supporting evidence for his continental drift idea. The correct option is c. similar fossils were found on different continents.