Question: According to Van Houten et al.'s (1988) guidelines, which principle most directly supports using effective single-case interventions with clients? Need Assignment Help? Group of answer choices Clients have the right to treatments that produce the fastest results possible, regardless of risks. Clients have the right to treatment based on functional assessment and the most effective available procedures. Clients have the right to receive only group-based validated interventions. Clients have the right to remain in baseline conditions indefinitely for research control.