The most appropriate would be D or A. I don't see how wearing different shoes would help the clients knees.
Answer:
produce sound when they come together and then vibrate as air passes through them during exhalation of air from the lungs. This vibration produces the sound wave for your voice. In order for the sound to be clear and not raspy or hoarse, the vocal folds must vibrate together symmetrically and regularly
Explanation:
You must be 21 to use alcohol, use of alcohol underage can have the adult /parent in custody.
