The correct answer is C. The tone helps the reader interpret an author's attitude on a subject.
Explanation:
In texts, the tone can be determined by analyzing the words the author uses and point of view these convey. Due to this, the tone focuses on the position or general attitude of the author towards the main subject of the text. For example, in a text about global warming, the tone can be formal, optimistic or serious and each of these relates to different attitudes. Moreover, the tone should be analyzed because, in this way, the reader can understand the attitude of the author and how this affects the text. According to this, "the tone helps the reader interpret an author's attitude on a subject".
