Why were U.S. casualties so much lower than other countries?

(1 point)
Responses

The U.S. had better fighters
The U.S. had better fighters

The U.S. joined the war later
The U.S. joined the war later

The U.S. switched sides partway through the war
The U.S. switched sides partway through the war

The U.S. didn't require a draft right away

The U.S. didn't require a draft right away