upon reaching land, what did christopher columbus mistakenly believe he had discovered?

a. asia
b. africa
c. australia
d. antartica

a. Asia

Upon reaching land, Christopher Columbus mistakenly believed he had discovered:

a. Asia

Christopher Columbus mistakenly believed that he had discovered Asia upon reaching land. To get this answer, we can rely on historical records and knowledge about Columbus' voyages.

To find the answer, you can:

1. Conduct a basic search on the internet using the keywords "Christopher Columbus" and "discover." This should provide you with a list of reputable sources and historical accounts regarding Columbus' discoveries.
2. Open any reliable source, such as reputable history websites or scholarly articles, which can provide accurate information about Columbus' voyages.
3. Look specifically for information about Columbus' belief regarding the land he discovered.
4. Read through the provided information to determine which option Columbus mistakenly believed he had discovered: Asia, Africa, Australia, or Antarctica.

Based on historical accounts, Christopher Columbus believed that he had reached Asia, but in reality, he had stumbled upon the Americas.