​Which of the Following Events Prompted the Mormons to Abandon

​Which of the following events prompted the Mormons to abandon their settlement at Nauvoo, Illinois and set out West to the valley of the Great Salt Lake?  

A) Continuing vicious hostility by non-Mormon Americans including the murder of Mormon leader Joseph Smith and his brother
B) ​A vision by the Mormon angel Moroni to Brigham Young of a peaceful, bountiful, and safe refuge in the valley of the Great Salt Lake
C) The expectation that a lush, easily arable western enviornment awaited the Mormons in present-day Utah, which would not require or expensive and technologically sophisticated irrigation to grow crops
D) A generous land grant by the federal government
E) ​All of these choices are correct.