| List I | List II | ||
| A. | Placebo effect | I. | We can draw clear causal conclusion from an experiment |
| B. | High external validity | II. | The results of a study generalize to other settings and populations |
| C. | Double-blind procedure | III. | Participant improves because of the expectation of receiving a treatment, not because of the treatment itself |
| D. | High internal validity | IV. | Neither researchers nor participants IV. know the condition to which each participant is assigned |
Find the next two terms of the series:
The given series is: \( A, C, F, J, ? \).
(A) O
(B) U
(C) R
(D) V
Choose the correct answer from the options given below: