In the mid-1800s, pioneers who traveled through the great plains to the west faced
a.) summer rainstorms and difficult terrain.
b.) rugged mountains and steep passes.
c,) summer rainstorms and rugged mountains.
d.) steep passes and difficult terrain.

a.) Summer rainstorms and difficult terrain.

Explanation:

Summer rainrstorms and the difficult terrain were the most common issues and made crossing west slow and dangerous. Particularly, traveling through the Great Plains to the West in summer meant that the pioneers would have to battle with more regular severe thunderstorms, which occasioned drenching storms usually accompanied by hail and powerful winds that could destroy wagons and tents.

“the iliad” (gr: “iliás”) is an epic poem by the ancient greek poet homer, which recounts some of the significant events of the final weeks of the trojan war and the greek siege of the city of troy (which was also known as ilion, ilios or ilium in ancient times).