求问一道SC题目

lindalindaliu

有道SC题目，麻烦各位大神解释一下~
1. In June 1996 an oil barge ran aground off the coast of Mexican Gulf, leaking its cargo of 350000 gallons into the ocean,while leading to the pollution of the city's beaches.
A. leaking its cargo of 350000 gallons into the ocean,while leading to the pollution of
B. with its cargo of 350000 gallons leaking into the ocean, and it polluted
C. and its cargo of 350000 gallons leakded into the ocean, polluting
D. while it leaked its cargo of 350000 gallons into the ocean and led to the pollution of
E. so that its cargo of 350000 gallons leaked into the ocean, and they were polluting

答案选C 求解释~  感谢

kiwifoodtown

C选项，and its cargo of 350000 gallons leakded into the ocean这句与前句并列描述事件。polluting作结果状语表达事件结果。