If you ever saw the movie Apocalypto, also was apart of the Aztec Culture but as the Mayan, the priest would do the blood-letting and human sacrifice. The answer is B!
The Europeans tried so hard to find an all-water route to the Spice Islands becuase they wanted to find a faster route to the New World. Going by land took to long so they wanted a short cut.
Answer: They wanted to find a faster route to the New World.
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Generally speaking, yes it is true that a historian's analysis of events involves knowing the difference between facts and theory, since it is impossible to make a strong and respectable claim without citing specific, factual historical evidence.