I would choose B, but that's my opinion, so it's probably different from yours.
In the spring of 1846, a group of nearly 90 emigrants left Springfield, Illinois, and headed west. Led by brothers Jacob and George Donner, the group attempted to take a new and supposedly shorter route to California
A simple sentence consists of only 1 clause. examples: 1. Joe waited for the train. 2. the train was late. 3. Fred and Dobby took the bus.
