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C. when early explorers travelled from Europe and Asia to the Americas
People began to notice that the coastlines of continents fit together like pieces of a puzzle when the first explorers traveled from Europe and Asia to the Americas.
The first theory about Pangaea was proposed by Alfred Wegner, at the beginning of the 20th century. Wegner's theory, known as continental drift, was based on observing the similar contours of the coasts of America and Asia.
The comparison of fossils of the same animals found in Brazil and Africa was also analyzed, which led Wegner to the conclusion that the animals had lived in the same environment.
Pangaea was initially an unaccepted theory, and it was only confirmed in the year 1940.
Therefore, the correct alternative is:
- When early explorers traveled from Europe and Asia to the Americas.
Learn more about pangaea here:
https://brainly.com/question/11694556