I’m pretty certain it’s d because it does not state anywhere that the sound waves are not powerful enough to make the vocal engine useful. hope this helps brainlist would be much appreciated :)
<span>In discussing one of the social skills, we present the following definition: "to be able to persuade, convince others of their convictions and ideas, through appropriate arguments (to the environment and to the people involved), and to identify alternatives to obtain such support." This definition refers to:</span>
