Directions: The following sentences test correctness and effectiveness of expression. Part of each sentence or the entire sentence is underlined; beneath each sentence are five ways of phrasing the underlined material. Choice A repeats the original phrasing; the other four choices are different. If you think the original phrasing produces a better sentence than any of the alternatives, select choice A. If not, select one of the other choices.

In oceanography, there must be a balance between explaining the value and workings of marine organisms, revealing the secrets of ocean currents and geophysical fluid dynamics, and to promote respect for the marine world.

between explaining the value and workings of marine organisms, revealing the secrets of ocean currents and geophysical fluid dynamics, and to promote

among explaining the value and workings of marine organisms, revealing the secrets of ocean currents and geophysical fluid dynamics, and promoting

between explaining the value and workings of marine organisms, revealing the secrets of ocean currents and geophysical fluid dynamics, and promoting

among explaining the value and workings of marine organisms, the revelation of the secrets of ocean currents and geophysical fluid dynamics, and to promote

between explaining marine organisms’ value and working, in revealing the secrets of ocean currents and geophysical fluid dynamics, and in promoting