Question

in 1945, what concern did the allies have about invading the japanese mainland with ground forces? they were worried they did not have enough soldiers. they were worried there would be too great a loss of life. they were worried the japanese were developing an atomic bomb. they were worried the japanese had a stronger fleet in mainland ports

Explanation:

In 1945, the Japanese were expected to fiercely resist an Allied ground - force invasion of the mainland. Estimates of casualties on both sides were extremely high, leading to concerns about a great loss of life. There was no evidence that the Japanese were close to developing an atomic bomb, and the Allied fleet was dominant. Also, the Allies had a large number of soldiers available.

Answer:

They were worried there would be too great a loss of life.