All of the following were associated with the Central Pacific Railroad except: A. Scotch-Irish immigrant labor
B. nitroglycerine explosives
C. engineering of bridges and tunnels
D. the "Big Four"

although world war i began in 1914, the united states did not join the war until 1917. the additional firepower, resources, and soldiers of the u.s. to tip the balance of the war in favor of the allies. remaining neutral. when war broke out in 1914, the united states had a policy of neutrality.

a

explanation:

i'm asking the same thing i asked this other cat all of