"I'll be back by 11," Rhea told the babysitter in a high-pitched voice as she fumbled with her purse. "No later than 11. If you need anything, call me on my cell. If I don't answer, try the restaurant. Here's the number. Just call if you need anything . . . anything at all."
What is the most likely inference a reader can make about Rhea's emotional state?
A. She is angry.
B. She is regretful.
C. She is calm.
D. She is nervous.