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Verbal·Standard English Conventions·Form, Structure, and Sense

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The scientific team using the Prime Focus Spectrograph (PFS) to conduct a cosmological survey, which has produced one of the most detailed 3D maps of the cosmos to date, plans to observe roughly 45 million celestial objects. Mounted on a telescope in Chile,       

Which choice completes the text so that it conforms to the conventions of Standard English?

A

this impressive instrument can measure 4,000 galaxies simultaneously, tracking how matter is distributed throughout the cosmos.

B

the distribution of matter throughout the cosmos is tracked by researchers using this impressive instrument that can measure 4,000 galaxies simultaneously.

C

4,000 galaxies can be measured simultaneously by this impressive instrument, tracking how matter is distributed throughout the cosmos.

D

researchers track how matter is distributed throughout the cosmos with this impressive instrument that can measure 4,000 galaxies simultaneously.