题目选项分析

In January 1994 an oil barge ran aground off the coast of San Juan, Puerto Rico, and its cargo of 750,000 gallons leaked into the ocean, polluting the city's beaches.

In January 1994 an oil barge ran aground off the coast of San Juan, Puerto Rico, while it leaked its cargo of 750,000 gallons into the ocean and caused the pollution of the city's beaches.