|Question 19Verbal

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Text
As the exoplanet 7 Canis Majoris c orbits a star 65 light-years from Earth, the gas giant's gravity causes the star to wobble. In 2019, astronomers observing the wobble–indicated by redshifts and blueshifts in the star's spectral wavelengths–eventually attributed _______ to the gravitational influence of the previously undetected exoplanet.
Which choice completes the text so that it conforms to the conventions of Standard English?
it
A
each
B
these
C
them
D