Respuesta :
In 1945, the concern which the Allies had about invading the Japanese mainland with ground forces was:
- B. They were worried there would be too great a loss of life.
What is an Invasion?
This refers to a military tactic where the armed forces of a country or a place go into enemy territory with the aim of defeating the troops and claiming the territory.
With this in mind and from the events in history, we can see that after the bombing of Pearl Harbor by the Japanese Navy, there were concern by the Allies of invading the Japanese mainland with ground forces because they feared the great loss of life.
Read more about Pearl Harbor here:
https://brainly.com/question/860420