Which of the following statements is true regarding the construction of the transcontinental railway?
AConstruction began in Omaha, Nebraska, in 1863 and in Sacramento, California, in 1865.
BMost workers for the Union Pacific Railroad were Chinese.
CMost workers on the Central Pacific leg of the railway were Chinese.
DThe Sierra Nevadas were the most difficult obstacle for the Union Pacific Railroad.
AConstruction began in Omaha, Nebraska, in 1863 and in Sacramento, California, in 1865.
BMost workers for the Union Pacific Railroad were Chinese.
CMost workers on the Central Pacific leg of the railway were Chinese.
DThe Sierra Nevadas were the most difficult obstacle for the Union Pacific Railroad.