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I think the answer would be A
Ferdinand Magellan was the first (at least his crew) to successfully lead an expedition to circumnavigate the world. (he died on the voyage, but ~3 sailors made it back i believe, forgot the number of sailors, but very little)
hope this helps
B. They were escaping from the Church so they decided to come to America taking over the Natives Land and killing thousands because of the diseases they brought
A Christian is a person who adheres to Christianity.
The name derives from Jesus CHRIST of course and fron the Greek "Christòs" (messiah)
Christian is also used as an adjective to indicate everything that is holy and associated to Christianity