Answer:
To avoid been seen as uncertain of what you have to say speak a little louder than you would normally ( A )
Step-by-step explanation:
been nervous affects your vocal cords and your voice might sound a bit unsettled when you speak at your normal tone.
raising your tone a little louder when you speak will help cancel out that unsettled tone that might want to creep in while you speak to your prospective clients.
talking to your cell phone as you walk will only make you more nervous because your phone doesn't depict a human nature
hold an empowered image and squared shoulder will only make you appear arrogant and proud.