How did the United States' government help facilitate the building of the first transcontinental railroad? Select one:
O a. The United States government did each of these things to facilitate the construction of the transcontinental railroad.
O b. The government granted land and paid incentives to the two companies building the railroad.
O c. The United States government led a series of campaigns to remove Native Americans from the area surrounding the construction projects.
O d. The government passed legislation that was favorable to increasing the supply of immigrant labor.