Question

while columbus was a skilled sailor, he made a huge miscalculation in what?

understanding the wind and water current patterns of the atlantic ocean

iestimating the actual size of the earth

recognizing how much food and water he must take on board each ship to feed his crew

communicating with the native americans in the bahamas, where immediate warfare broke out upon his arrival

asking for continued support from ferdinand and isabella, which was soundly refused

Explanation:

Columbus underestimated the Earth's circumference (or overestimated Asia's proximity), leading him to believe he'd reach Asia but instead landing in the Americas. The other options are incorrect: he was skilled with Atlantic winds/currents, managed provisions, had relatively peaceful initial contact with Natives, and received support from Ferdinand/Isabella.

Answer:

B. estimating the actual size of the Earth