Which of the Following Statements Describes the Phenomenon Known as 'Missing

Which of the following statements describes the phenomenon known as 'missing fundamental'?

A) People affected by a rare form of hearing impairment are unable to detect the fundamental frequencies of sounds.
B) It's the process through which the fundamental component of a melody is removed to improve its sound quality.
C) Listeners can hear the pitch corresponding to the fundamental frequency even when this component is not present.
D) The reduction of hearing in noisy environments is attributable to difficulties detecting fundamental frequencies.