1. Most workers for the Central Pacific Railroad were Irish. Thus, option first is correct.
2.John Loudon McAdam developed a method for building of roads. Thus, option fourth is correct.
What is Railroad?
Railroad refers to the road which has the rail lines linked to ties and laid on a roadbed that serves as a track for vehicles pulled by locomotives or propelled by independent motors.
Most of the early employees were immigrants from Ireland. The management was chaotic, and the railroad work was difficult, which resulted in a high attrition rate.
Therefore, it can be concluded that The majority of the Central Pacific Railroad's workforce was Irish and John Loudon McAdam created a technique for constructing roadways.
Hence, option first is correct for first part of question and option fourth is correct for second part of question.
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