OG 12 SC-36

Nickyl90

OG12, 36
36. Dressed as a man and using the name Robert Shurtleff,
Deborah Sampson, the first woman to draw a soldier’s
pension, joined the Continental Army in 1782 at the age
of 22, was injured three times, and was discharged in
1783 because she had become too ill to serve.

(A) 22, was injured three times, and was discharged
in 1783 because she had become
(B) 22, was injured three times, while being
discharged in 1783 because she had become
(C) 22 and was injured three times, and discharged
in 1783, being
(D) 22, injured three times, and was discharged in
1783 because she was
(E) 22, having been injured three times and
discharged in 1783, being

为什么C选项不可以呢，不能把discharged前的was看做省略吗，因为was injured three times已经有了was?

谢谢各位了