What caused the building of the transcontinental railroad to be delayed

The cause of the delay of building the Transcontinental Railroad is because of the newly inaugurated president Ulysses S. Grant announced that he would withold the federal funds until the two railroad companies agreed to cooperate. Also, the two railroad companies, Central Pacific and Union Pacific would each build the ends of railroad and would meet in the middle. Along the way, both companies encountered difficulties. The Central Pacific were dominated by the four businessmen which all of them do not have any experience in building railroads, engineering, or construction. They borrowed to finance the project and exploited legal loopholes. Moreover, the Union Pacific suffered bloody attacks on its workers.

how do you know that

explanation:

the first option is correct

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~courtney