求助求助求助求助求助

The 151 member governments of the World Bank are expected to increase the bank’s funding by $175 billion, though some United States legislators cite an obstacle to congressional passage being the concern that the bank’s loans will help foreign producers compete with American businesses.
A. an obstacle to congressional passage being the concern
B. a concern as an obstacle to congressional passage
C. as an obstacle to congressional passage the concern
D. the concern, an obstacle to congressional passage
E. as an obstacle for Congress to pass it the concern

答案是c，cited后不应该加noun么？对这题没感觉，期待NN给个完整的解释~~~最近看语法，看得人都痴痴呆呆了~~~