What difficult engineering project did Refines Sims work on? E. Building the Hoover dam
F. Transporting the first atomic bomb.
G. Building the ALCAN Highway.
H
lavina telearanh cable across the Atlantic Ocean

G.building the ACLAN Highway

Explanation:

I took that test

i do believe its (d) it allowed the government to offer pioneers sixty acres of western land if they lived on it and made improvements to it.

explanation: signed into law in may 1862, the homestead act opened up settlement in the western united states, allowing any american, including freed slaves, to put in a claim for up to 160 free acres of federal land. by the end of the civil war, 15,000 homestead claims had been established, and more followed in the postwar years