Answer:
I believe the answers are b. and d. in that order as well.
Explanation:
I think the most important event was when the pilgrims came to the Americas. Although they came there to escape persecution, they were the first to start a colony and life there. Once that colonization started, many other European also wanted to come to the Americas to find more freedom and escape persecution.
1st all black regimen, but lead by a white man
Because he gave them what they wanted. For a definite price but they went on and did it anyway.
Leader Nikita Khrushchev said the quote above.
I hope this answer was helpful!! :)