Which event happened prior to the signing the pacific railroad act in 1862?
a. asa whitney requested the right to build a transcontinental railroad.
b. the end of the civil war freed veterans to work on the railroad.
c. the golden spike ceremony was held in honor of the transcontinental railroad. d. railroad workers drilled tunnels through the sierra nevada mountains.

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.

- "the civil rights movements"

- "following the american civil war and abolition of slavery, the united states entered a period known as reconstruction, during which black americans continued to suffer from disenfranchisement, racial segregation, and economic oppression. beginning in the early 1950's, black americans launched a series of major campaigns of civil resistance, emphasizing the need for nonviolent protests and civil disobedience."

"such as the montgomery bus boycott of 1955-56, a campaign launched by rosa parks against the policy of racial segregation of the public transit system in alabama. “sit-ins” became popular across the american south, particularly in greensboro, north carolina, increase national sentiment."

- "the counterculture movement"

- "counterculture began to develop in the united states following the rise of conformity in american culture during the 1950s. by 1963, youth, particularly those of the white middle class, began rejecting the cultural standards and normality of their parents, opting for progressive attitudes instead. the movement gained momentum as the civil rights movement became increasingly successful and as the u.s. military intervention of vietnam began to take a negative turn."

"hippie counterculture moved further into popular culture following the summer of love in 1967 when thousands of people came together in the haight-ashbury neighborhood of san francisco. along with greenwich village in new york city, haight-ashbury became a hub for the counterculture movement."