A voice loud enough to be heard

A. Audible

B. Applaudable

C. Laudable

D. Oral

Answer: Option A

Solution(By Examveda Team)

One word substitute is Audible.

Audible: able to be heard.
Applaudable: (of an action, idea, or aim) deserving praise and commendation.
Laudable: (of an action, idea, or aim) deserving praise and commendation.
Oral: spoken rather than written.