Concept:To rearrange jumbled sentences, trace the emotional and chronological flow that connects each sentence to the next.
Explanation:S1 states Sofia’s voice did not change. Sentence B directly describes Roberto’s reaction to her frank and pure tone, so B naturally follows S1.
Next, sentence D shows that Roberto now accepts everything as natural, which fits his state of mind after hearing her.
Then sentence A continues with his feeling that this evening was predestined and long awaited.
After that, sentence C describes their mutual gaze before parting, which leads smoothly to S2 where Sofia offers her hand and Roberto bows.
This order BDAC keeps the paragraph coherent and logical.
Answer:BDAC, which is option D.