Which one of following best expresses the main idea of the passage? A. Oil companies are experimenting with technologies that may help diminish the danger to workers from offshore crude processing. B. Oil companies are seeking methods of installing processing facilities underwater. C. Researchers are developing several new pumps designed to enhance human labor efficiency in processing facilities. D. Researchers are seeking to develop equipment that would preempt the need for processing facilities onshore. E. Researchers are seeking ways to separate liquids from gases in crude in order to enable safer processing.