D because it does not relate back to boosted brain power
Not having the excerpt here, I can only help you to find the answer. Mood is the feeling you get when you read the passage. Foreboding is fearful or apprehensive. Welcoming is or can be joyful and accommodating or making someone feel comfortable in their surroundings. Sorrowful is sad or mournful. Optimistic is positive, hopeful, and confident about your future. As you read the passage, which of these are you feeling or closely matches your feelings.
