Lc) which of the following turned the war in the pacific in the allies' favor?

The Battle of Guadalcanal 

Guadalcanal was the first major offensive and a decisive victory for Allies in the Pacific theater. With Japanese troops stationed in this section of Solomon Islands, U.S. marines launched a surprise attack in August 1942 and took control of an air base under construction. Reinforcements were funneled to the islands as a series of land and sea clashes unfolded, and both sides endured heavy losses to their warships contingents. However, the Japanese suffered a far greater toll of casualties, forcing their withdrawal from Guadalcanal by February 1943

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The transcontinental railroad provided a means of fast transportation. it cut a 6 month trip into 6 days, created jobs for many people and encouraged immigration. the homestead act played a huge role in western expansion; it allowed settlers to begin a fresh start, and gave them land in exchange for their residence for up to five years and a small fee.