关于OG13 37，搜过大家的提问，但是我想问的不一样

37. 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

　　(A)22, was injured three times, and was discharged in 1783 because she had become

正确答案是A，我想问这个题为什么不考虑 RUN-ON？两个动词之间没有加连词（joined 和 was injured） 为什么就可以呢？

虽然可能是很蠢的问题，但是还是求NN赐教！！