The answer to this question would be C. Article I.
This is the part of the Constitution that establishes the legislative branch of the government. It will be called as the Congress. The Congress would be composed of a House of Representatives and a Senate which then forms a bicameral legislative. The Bill of Rights, the Article II of the United States Constitution, and the Amendment I of the United States Constitution, would be the wrong choices on this problem.
Aside from the pay, the reason Texas cowboys re-upped for a cattle drive was for the adventure. Although the drive might be boring at times, with weeks and sometimes months on the trail with nothing to see but dust and flat lands, natural and man-made challenges occurred occasionally. One of the most frightening challenges encountered in a drive was crossing a river. A swift river could carry a man, a horse or a cow. A slow moving river might camouflage quicksand and deep holes both of which were dangerous also.