The correct answer is D) Buffalo extermination.
All of the following was associated with the Union Pacific Railroad except the buffalo extermination.
The Union Pacific Railroad constructed the railroads from Omaha, Nebraska to the West, and connected with the railroads constructed by the Central Pacific company in Utah. The Central Pacific started the construction from Sacramento to the East. This allowed to finally connect the United States from East to West. They connected on May 10, 1867. The Pacific Railroad Acts of 1862 allowed the construction of this important railroad system. The Union Pacific was involved in the scandal of Credit Mobilier, after receiving loans from it, not only federal loans and grant loans.
