JOHNSON (This is a woman who decided long ago to be enthusiastic about EVERYTHING in life, and she is inclined to wave her wrist vigorously at the height of her exclamatory comments.): Hello there, yourself! How are you this evening, Ruth?

Which assumption about Johnson is most likely true based on the stage direction?

A. She has a wrist tremor that acts up when she becomes stressed.
B. She is an excitable person who is emotionally unstable.
C. Her constant enthusiasm is a pretense that cannot be trusted.
D. Her enthusiasm is used to mask her fear of public places.