Which statements about the Mormon religion and its founders are true?

Choose all answers that are correct.

A.
Mormons were persecuted for refusing to let new members into their church.

B.
The Church of Jesus Christ of Latter-Day Saints was founded by Joseph Smith.

C.
When Brigham Young was murdered, Mormons went west to find a new leader.

D.
Early Mormons practiced polygamy, meaning a man could have more than one wife.