Which one of the following statements best expresses the main idea of the passage? A. Although the new abiogenic theory about the origin of oil is derived from the conventional biogenic theory, it suggests new types of locations for oil drilling. B. The small number of drilling companies that have responded to the new abiogenic theory about the origin of oil reflects the minimal level of acceptance the theory has met with in the scientific community. C. Although the new abiogenic theory about the origin of oil fails to explain several enigmas about oil reservoirs, it is superior to the conventional biogenic theory. D. Although it has yet to receive either support or refutation by data gathered from a drilling project, the new abiogenic theory about the origin of oil offers a plausible alternative to the conventional biogenic theory. E. Having answered objections about higher pressures in the earth's core, proponents of the new abiogenic theory have gained broad acceptance for their theory in the scientific community.