China Asia Persia. Really any empire in Asia.
Answer:
Explanation:
There were several reasons why King Ferdinand and Queen Isabella supported the voyage of Columbus. There was a belief that a shorter route to Asia existed. Spain had a strong interest in trading with Asia. ... The King and Queen of Spain sponsored Columbus because they believed Spain would benefit from his voyages.
You need a variable. If something happens once it could just be chance. Like if you got a lottery ticket and won, it would just be chance. Not the thing that happens the most.
The answer is: [B]: "requirements research" .
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