The production of sound/human voice is attributed to the three components; Which one is not?
a. The lungs that produce sufficient airflow and air pressure;
b. Men and women have different sizes of vocal fold or cords;
c. The articulates (parts of vocal tract such as tongue, palate, lips) that articulate and filter the sound emanating from the larynx;
d. The vocal folds within the larynx that are responsible for producing the sound;