|Question 18Verbal

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The exoplanet Kapteyn c was discovered using an indirect approach to planetary detection, the radial velocity method. Compared to that of the direct imaging method, _____ the effect these exoplanets have on nearby stars.
Which choice completes the text so that it conforms to the conventions of Standard English?
the radial velocity method's zone of discovery is vast, as distant exoplanets too dim to be observed are detected by
A
distant exoplanets too dim to be observed are detected within the radial velocity method's vast zone of discovery through
B
the radial velocity method, with its vast zone of discovery, detects exoplanets that are too dim to be observed by
C
the detection of distant exoplanets, too dim to be observed in the radial velocity method's vast zone of discovery, is based on
D