Which mistake did Columbus make in the expedition that led him to the Americas?

A.
He miscalculated the size of the earth and thought he had reached Asia.

B.
He thought the language of the people he met was Chinese and didn't realize he was in the Americas.

C.
He did not bring enough supplies, so he had to stop in the Americas instead of going all the way to Asia.

D.
He did not realize how bad storms could be and got so far off course that he reached the Americas instead of Asia.