"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.