21-24 questions answer them, as soon as possible

21. Important considerations when developing a research question in social och disk of the following except a relevancy to social work policy or practice b. making sure it is measurable. c. having a focus that is broad. d. conducting a feasible study For the next three questions (Questions 22 to 24), please read the following strat und we the questions below: Background: Given the limited success of self-harm-focused psychological interventions, teachers tested whether a mentalization-based treatment for adolescents (MBT-A) is more effective than the as-usual (TAU) for adolescents in reducing self-harm in adolescents using a 12-month vetervention program that included both individual and family therapy. Method: A total of 89 stolescents preventing to mental health services were randomly allocated to either MBT-A OF TAU. Adolescents were w by self-report of self-harm at baseline and at 3-monthly intervals until 12 months after the intervention The primary outcome was self-harm based on a 38-item measure, Risk-Taking and Self-Harm Inventory Results: In general, both groups benefitted from treatment based on self-harm. However, MST-AW more effective than TAU in reducing self-harm. Discussion: MBT-A may be an effective intervention to reduce self-harm in adolescents. 22. Identify the correct null hypothesis for this study, a. There is no relationship between the two interventions (MBT-A and TAU) tayong the adolesomts. b. MBT-A was ineffective on self-reported self-harm among the adolescents. c. There is no difference in self-reported self-harm among the adolescents based on receipt of the type of intervention received. d. There is improvement in reducing self-harm among the adolescents who received the MBT-A and TAU. 23. Identify the independent variable of the study. a. Adolescents (b. Self-harm c. Type of intervention d. TAU 24. What is the level of measurement of the IV? a. Ratio B. Ordinal c. Interval d. Nominal