Final answer:
In ABA, Discrete Trial Training, Functional Communication Training, and Pivotal Response Training are all evidence-based practices that help improve communication of wants and needs; therefore, all of the listed options can be effective.
Step-by-step explanation:
In Applied Behavior Analysis (ABA), there are several evidence-based practices that can be employed to help someone learn to communicate their wants and needs. The methods that can assist with this goal include: Discrete Trial Training (DTT), which involves breaking down skills into discrete steps and teaching each step of the skill one at a time; Functional Communication Training (FCT), which focuses on teaching alternative communication strategies to replace inappropriate behaviors; and Pivotal Response Training (PRT), which aims to increase a student's motivation to learn, monitor their own behavior, and initiate communication with others.
Thus, the correct answer is option 4: All of the above. These practices can be part of a comprehensive program that might also include social communication groups, social skills groups, occupational therapy, and in some cases, medication options.