GRE Reading Comprehension: ETS-GRE阅读ETS - 24KHP81C7GF1KND57

The passage supports which one of the following statements about the natural pressure driving the flow of crude? A. It is higher than that created by the centrifugal pump. B. It is constant regardless of relative proportions of gas and liquid. C. It is able to carry the crude only as far as the wellhead. D. It is able to carry the crude to the platform. E. It is able to carry the crude to the shore.