9. Mr. Tucker is a high school health teacher who has students of various levels of English language proficiency in his classes. He asks beginning-level students yes/no questions, often with the use of visual cues. He asks intermediate-level students either/or questions, to which possible answers are limited. Finally, he asks advanced students more grammatically complex questions, such as embedded and open-ended questions that use “who,” “what,” “when,” or “where.” The practice best reflects which of the following principles related to questioning strategies?