The correct option is A: Asa Whitney requested the right to build a transcontinental railroad.
Before the signing of Pacific Railroad act in 1862 by president Lincoln, Asa Whitney requested the right to build a transcontinental railroad which would link the United States from east to west.
The Pacific Railway Act was signed into law by President Abraham Lincoln on July 1, 1862. This act provided Federal government support for the building of the first transcontinental railroad, which was completed on May 10, 1869.