The current administration, being worried over some foreign 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.
(A) being worried over some foreign trade barriers being removed and our exports failing
(B) worrying 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
(D) in that they were worried about the removal of some foreign trade barriers and also about the failure of our exports
(E) because of its worry concerning the removal of some foreign trade barriers, also concerning the failure of our exports
如果选择C，那么worried about 是做什么成份呢？怎么能用ed 形式呢？
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