How would you explain the answer to this question? What rules apply?
More than five thousand years ago, Chinese scholars accurately described the flow of blood as a continuous circle controlled by the heart, but it went unnoticed in the West.
A. but it went
B. but it was
C. although it was
D. but the discovery went
E. although the discovery was
Answer D
More than five thousand years ago, Chinese scholars accurately described the flow of blood as a continuous circle controlled by the heart, but it went unnoticed in the West.
A. but it went
B. but it was
C. although it was
D. but the discovery went
E. although the discovery was
Answer D
