Vowels Are Made By

Vowels are made by:

A) Closing or restricting some part of the vocal tract at the beginning or the end
B) Modifying the shape of the vocal tract, which remains more or less open while the sound is being produced
C) Putting the front of the tongue on the alveolar ridge
D) Putting the tongue to the middle of the palate
E) Putting the tongue towards the front of the hard part of the roof of the mouth, the palate, near the alveolar ridge