Final answer:
The correct answer is d. Low-amplitude.
Step-by-step explanation:
The correct answer is d. Low-amplitude. While cocaine use is associated with a variety of EEG patterns, the text implies that low-amplitude activity is among these patterns. EEG stands for electroencephalogram, which measures the electrical activity of the brain. Low-amplitude activity refers to smaller wave heights on the EEG, indicating decreased brain activity.