Good practices:
Speaking clearly
Standing straight and tall
Controlling your pacing
Speaking with the same volume
Moving your hand often to keep attention
Bad practices:
Looking at your notes the entire time
C
the comma separates the two clauses
It would be C beacquse it is incorrect from the bC time period
The correct interrogative pronoun is "Who" in "Who are you?" because "whom" is used as a relative pronoun and is used to denote a indirect object.