Select the most appropriate option to substitute the underlined segment in the given sentence. If there is no need to substitute it, select No substitution required.We really need to look at interventions who focus in long-term weight management that can achieve sustained weight loss at the recommended one to two pounds per week.

• A. whom focus on long-term
• B. that focus on long-term
• C. that focus with long-term
• D. No substitution required