Which of the following statements was true by the end of the war?
A: Some 900,000 Rebles had fought.

B: Some 2.1 million Yankees had fought.

C: Almost 10,000 Mexicans and 200,000 African Americans had fought.

D: All of these are true

E: None of these are true

PLEASE ANSWER I PROMISE ILL MARK BRAINLIEST PLEASE MAKE ANSWER CORRECT!!!