8.     Among the emotions on display in the negotiating room were anger for repeatedly raising the issue over and over again and preventing the raw wounds from earlier battles from ever beginning to heal.

(A) were anger for repeatedly raising the issue over and over again and preventing the raw wounds from earlier battles from ever beginning to heal

(B) was anger for repeatedly raising the issue and preventing the raw wounds from earlier battles from ever beginning to heal

(C) were anger over repeatedly raising the issue and preventing the raw wounds from earlier battles to begin healing

(D) was anger about the issue, which was raised over and over, and preventing the wounds from earlier battles, still raw, to begin healing

(E) were anger about the issue, which was raised repeatedly, and preventing the raw wounds from earlier battles to begin to heal

请问Among the emotions on display in the negotiating room　是介词短语　为什么能做主语　我还见过有between开头的，也是这种情况吗？　谓语应该用单数还是复数？