The events related to westward expansion that affected African Americans are Missouri Compromise, Dred Scott v. Sandford, Fugitive Slave Act, Kansas-Nebraska Act and Bleeding Kansas.
Missouri Compromise became the first compromise in America between the states favouring slavery and non-slavery. Missouri entered as a slave state.
Dred Scott court case for freedom raised hostility between the South and the North related to slavery.
Fugitive Slave Act forced runaway slaves to return from the North to their masters in the South.
Kansas-Nebraska Act allowed Kansas to decide on slavery themselves.
Abolitionists attempt to destroy slavery led to Bleeding Kansas.
The given event Missouri Compromise had the strongest impact because it divided states based on slavery and free states.
Therefore we can conclude that option A, C, D, E and G are the correct answer.