Instead of traveling westward alone, groups joined together and traveled in trains.

The correct answer is Wagon

That is because the journey was so severe and it was such an endurance test that not going alone seemed like a good idea. So, the option they had, and usually would take instead of going alone, was to join wagons trains to travel about 12 to 15 miles per day.

on this day in 1913, henry ford installs the first moving assembly line for the mass production of an entire automobile. his innovation reduced the time it took to build a car from more than 12 hours to two hours and 30 minutes.

it was bribing i think i might be wrong though