Respuesta :
Options C and D feature parallel structure.
Parallel structure occurs when the same grammatical pattern is used. In options C and D, the same grammatical pattern is used in each: both are questions, and both begin with a verb followed by the subject.
Parallel structure occurs when the same grammatical pattern is used. In options C and D, the same grammatical pattern is used in each: both are questions, and both begin with a verb followed by the subject.