I believe it is A. If not, then B.
D.
Because the author can show how characters change (A), but they need to show how the characters acted before the change (C). And B is just what explains the character.
Answer:
Pioneers and settlers moved out west for different reasons. Some of them wanted to claim free land for ranching and farming from the government through the Homestead Act. Others came to California during the gold rush to strike it rich. Even others, such as the Mormons, moved west to avoid persecution.
Explanation: