Final answer:
The most appropriate next step is to ask students whether the literal meaning of "to make a mountain out of a molehill" is the author's intended message, which encourages them to analyze the author's use of figurative language.
Step-by-step explanation:
To help students understand the phrase "to make a mountain out of a molehill," the most appropriate next step is B. Asking students to decide whether the literal meaning of the phrase is the author's intended message. This encourages students to engage with the text and make inferences about the author's use of figurative language, promoting a deeper understanding of how such language can add specificity and layers of meaning to a narrative. It exemplifies the technique of showing rather than telling in writing, where the author uses language to create vibrant and engaging imagery for the reader.