Answer:
Hello the options to your question is missing below are the missing options
a ABA; ABAB design
b changing criterion design; Interaction design
c ABA; multiple baseline design across participants
d interaction design, alternating treatments design
answer : ABA; ABAB design --- ( A )
Step-by-step explanation:
In this example ABA design would be a bad choice, and ABAB design would be best
ABA also known as applied behavioral analysis used to improve social communication and it is a bad choice because it cannot be used to test/ return a behavior, while ABAB ( reversal design ) is used to test if an intervention was effective hence it is the best choice to ensure that the intervention is not returned back to baseline.