The current administration, being worried over some foreigh trade barriers being removed and our exports failing to increase as a result of deep cuts in the value of the dollar, has formed a group to study ways to sharpen our competitiveness
B:worring over some foreign trade barriers being removed, also over the failure of our exports
C:worried about the removal of some foreign trade barriers and the failure of our exports
答案选C 感觉很奇怪 C中的worried about做什么成分啊？后面已经有了一个has formed的谓语了啊！ | 
