As the exoplanet 17 Scorpii b orbits a star 408 light-years from Earth, the gas giant’s gravity causes the star to wobble. In 2020, 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.
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Verbal·Standard English Conventions·Form, Structure, and Sense
mediumWhich choice completes the text so that it conforms to the conventions of Standard English?
A
each
B
these
C
it
D
them