Sentence Correction

Traditionally, the term "blue moon" does not refer to the second full moon of a month, as they popularly think, but to the third full moon of a season with four full moons-a season is delimited by the equinoxes and solstices.

A. does not refer to the second full moon of a month, as they popularly think, but to the
B. does not refer to the second full moon of a month, which is popularly thought, but the
C. refers not to the second full moon of a month, as is popularly thought, but to the
D. refers not to the second full moon of a month, which is what is popularly thought, but the
E. refer not to the second full moon of a month, as would be popularly thought, and does refer to instead the

OA C

Source: Magoosh