Which of the following statements is true regarding the construction of the transcontinental railway?

A. Most workers for the Union Pacific Railroad were Chinese.
B. Construction began in Omaha, Nebraska, in 1863 and in Sacramento, California, in 1865.
C. Most workers on the Central Pacific leg of the railway were Chinese.
D. The Sierra Nevadas were the most difficult obstacle for the Union Pacific Railroad.

Question

Which of the following statements is true regarding the construction of the transcontinental railway? 

 
     
A.  Most workers for the Union Pacific Railroad were Chinese. 
B.  Construction began in Omaha, Nebraska, in 1863 and in Sacramento, California, in 1865. 
C.  Most workers on the Central Pacific leg of the railway were Chinese. 
D.  The Sierra Nevadas were the most difficult obstacle for the Union Pacific Railroad.