Which of the following conditions indicates a marijuana abuser is under the influence?

The correct choice indicates that a marijuana abuser under the influence typically exhibits specific behavioral signs. A person who is under the influence of marijuana often experiences a notable alteration in mental state, which can manifest as lethargy or drowsiness, commonly described as being in a stupor or seeming sleepy.

While loud and rapid talking and great bursts of laughter can be associated with certain substances, they are not classic indicators of marijuana use. Instead, the more common effects of marijuana include relaxation, increased appetite, and sedation, contributing to the observation that an individual may appear sleepy or drowsy. Therefore, the choice representing a person seeming in a stupor aligns more closely with the typical effects of marijuana usage.