B. options 2 and 3 only
Explanation:
Alcohol and other psychoactive drugs primarily affect the reasoning center of the new brain (option 2) and the neocortex (option 3). The reasoning center, located in the prefrontal cortex, is responsible for decision-making, judgment, and impulse control. The neocortex, which is involved in higher cognitive functions, can be influenced by psychoactive substances, leading to altered perceptions, thoughts, and behaviors. The primitive brain (option 1) and old brain (option 4) are more associated with basic survival functions and instincts, and their involvement is less pronounced in the effects of alcohol and psychoactive drugs.
