The correct answer is B; Crossing the Great Plains.
Further Explanation:
When travelers crossed the Great Plains while on the Oregon Trail they went mostly in wagon trains. This is when many families traveled behind each other in lines of wagons. Men would accompany the wagon trains on horseback in the front and back of the wagon trains.
There were hundreds of thousands of people who used the trail to migrate to the west.
Some of the risks they faced were;
Disease
Swollen rivers
Crossing the rivers
Deaths
Terrain
Indian Attacks but this happened more on the Santa Fe Trail.
Answer: Rosa parks decided to take a stand because she was tired of being treated like a nobody. It wasn't fair that because of your skin color you had to be treated different.
Barack Obama's first campaign for the presidency in 2008 utilized the internet and text messaging to keep in touch with supporters. He also ran on a platform of hope and change and rallied young voters in huge numbers.