Correct Response: B. The activity described in the scenario requires students to be aware of what they are thinking about as they are performing a mental activity (i.e., reading), the very definition of metacognitive awareness. To bookmark passages where they use comprehension strategies such as making predictions or self-questioning, or where they encounter an unfamiliar word, students must monitor their reading processes, including noting when comprehension breaks down. Options A, C, and D are incorrect because, although the activity described is likely to enhance students' reading comprehension over time by promoting their metacognition, in the short term, the activity interrupts their reading. As such, it is not specifically designed to promote their reading fluency (A), enjoyment of the text (C), or ability to concentrate on the text (D).