How do primary and secondary reinforcers differ?
A. Primary reinforcers are conditioned; secondary reinforcers are innately reinforcing

B. Primary reinforcers are biological; secondary reinforcers are learned

C. Primary reinforcers require pairing with an unconditioned stimulus; secondary reinforcers do not

D. Primary reinforcers are related to survival needs; secondary reinforcers are neutral stimuli

E. Primary reinforcers are consistently effective; secondary reinforcers vary in effectiveness

Choose the correct answer from the options given below: