Which is going to open a new plant A: Shin-Etsu. B: Mitsui Petrochemical. C: Mitsubishi Petrochemical.

The world's first lubricating oil was from petrochemical sources.

According to a police officer, the protest was triggered ________. A: for a local police commander ordered his men to open fire on them B: for a nearby petrochemical plant had dismissed some young employers C: for protesters demanded to find a job in the local oil-related factories D: for the police had killed a young man from the neighborhood