Answer:
C, Maintain a formal style.
Step-by-step explanation:
The first sentence makes the reader believe they will be reading about someone's opinion because it is in the 1st-person and it directly states that this is the narrator's thoughts, in a casual way. The text immediately shifts into a 3rd-person writing style, using evidence and commentary on such evidence. The casual tone degrades the value of the following text because the reader views the following text as a personal belief rather than advice or information. A formal style will elevate this text to the next level, separate the narrator from the topic, and allow the text to convey its meaning through information and analysis, rather than someone's opinion.