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, so that its cargo of 750,000 gallons leaked into the ocean, and they were polluting the city's beaches.