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！

整个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部分，做插入语，表明主语的状态。