Use the sentence to answer the question. “Their reasoning is sound, I must admit.” Which of the following best defines the bold phrase? (1 point) Responses It is based on evidence from different sources. It is based on evidence from different sources. It includes an explanation of the author's opinion. It includes an explanation of the author's opinion. It is thought out and convincing. It is thought out and convincing. It highlights the most important parts of the author's argumen