Fourteen-year-old judy ann is frustrated with the way the kids at school treat her during lunch. instead of sitting by herself like she normally does, she sits with another student at lunch. as they begin to engage in conversation, she notices that no one stops to make fun of her. because of this, she decides to no longer sit by herself at lunch. which of the following can be considered the operant?
a. the kids making fun of her
b. sitting with another student instead of sitting by herself
c. her frustration
d. the student she talks to at lunch