Answer:
C. Religious persecution and unfair treatment
Explanation:
The third option is a correct one as especially in early 1600s, but also later in early 1800s people were having unfair treatment by the ruling class, especially the Puritans who were banished from the authorities.
- First option is wrong because the best example of this is the immigration of Irish due to their famine.
- Second option is also not correct as it was not their main reasons, although they did gain new land.
- Fourth option is also not correct as this was not a reason especially in 1600s as they weren't sure what awaits them in the New World.