Vivian is under the influence of a psychoactive drug. She is experiencing changes in her emotions and perceptions. In particular, she sees in "Technicolor" because everything looks so vivid. Vivian is most likely experiencing an altered state of consciousness due to the effects of a. stimulants b. hallucinogens c. depressants d. opioids

Before selecting the option that best fits Vivian's experience, it's important to know the general effects of each type of drug listed: a. Stimulants: These drugs increase the activity of the central nervous system, leading to increased alertness, attention, and energy. b. Hallucinogens: These drugs alter perception, thoughts, and feelings, often leading to vivid and distorted sensory experiences. c. Depressants: These drugs slow down the central nervous system, typically leading to feelings of relaxation, drowsiness, or reduced inhibitions. d. Opioids: These drugs are pain relievers that can also produce feelings of pleasure and well-being (euphoria), but do not typically cause vivid or distorted sensory experiences.

Vivian's experience of vivid Technicolor perceptions and altered state of consciousness is consistent with the effects of hallucinogens. These drugs are known for causing vivid and distorted sensory experiences, which matches Vivian's perceptions. Therefore, the correct answer is: b. hallucinogens