Final answer:
The most accurate adaptation of the sentence is "please only tell me happy news, not sad. If the news is sad, do not say it happily," as it aligns with the intention to modulate the emotional delivery with the content of the news.
Step-by-step explanation:
The student is asking for an adaptation of a sentence in which the speaker requests that only happy news be conveyed and if the news is sad, it should not be shared in a joyful manner. The sentence wants to convey that one should modulate their emotional delivery based on the content of the news. The second and third options are incorrect as they ask for sad news to be relayed joyfully or to act happy regardless of the news being sad, which contradicts the speaker's request. The most accurate adaptation is: "Please only tell me happy news, not sad. If the news is sad, do not say it happily." This maintains the speaker's original intention to match the emotional delivery with the content of the news.