Answer:
A) operant conditioning
Step-by-step explanation:
To maintain a non-violent atmosphere in her classroom, Mrs. Elliot gives one golden star to every student who plays nicely with the other students. Mrs. Elliot's actions are in line with operant conditioning. Operant conditioning is a learning instrument where good behaviors are encouraged through rewards and bad behaviors are discouraged through punishments.
Mrs. Elliot rewarding a student who plays nicely is an example of operant conditioning.