Answer:
Crossing rivers were probably the most dangerous thing pioneers did. Swollen rivers could tip over and drown both people and oxen. Such accidents could cause the loss of life and most or all of valuable supplies. Animals could panic when wading through deep, swift water, causing wagons to overturn.
Explanation:
They it helpedto travel and justify theirselves
It was successful because when all blacks boycotted the buses, that takes a huge chunk of change out of the cities bus money which was a staple in how the city lived. Don't quote me on that though. Sorry it took someone 2 hours to respond to your question. Hope I helped :D