What happened to the plymouth colony over time?

D. It became part of the Massachusetts Bay Colony populated by more moderate Puritans.

Explanation:

This is what I found:

...but the colony was ultimately merged with the Massachusetts Bay Colony and other territories to form the Province of Massachusetts Bay.

...The Puritans established the colony of Massachusetts Bay in 1630. They hoped to purify the Church of England, and then return to Europe with a new and improved religion. The Puritans had left England because they didn't agree with the Church of England and they wanted to practice their own faith.

It's not a lot, but I hope that it helps. The other answers do not make as much sense. I also do not recall them. Though E does sound reasonable, I would still go with D because of the information provided.