'b' is correct It's a question, so you need a question mark
"Are you a doctor?" she asked.
Answer:
Explanation:
<em>Her stomach dropped like a free falling elevator.</em> [This is a Simile] She was so nervous that her stomach seemed to be reaching for new lows.
<em>Her voice an imposter as it boomed through the microphone</em>. [Metonymy]
Her voice sounded totally unfamiliar to her. It was an imposter imitating her real voice.
You get the idea that she didn't want to give a speech in front of this crowd.
