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Alcohol plusA. marijuanaincreases drowsiness, confusion, and anxiety.Low to high alcohol usage during adolescence and young adulthood does not appear to interfere with the maturation of executive functioning over time. In general, therecoverabilityof alcohol effects is uncertain.There is a general dearth of longitudinal data on cannabis usage and cognitive development. According to preliminary research, heavy to extremely heavy use may result inpoor developmentof executive functions and IQ.Adolescent cannabis and alcohol co-use has been associated to a variety of problems, including attentional control, learning and memory, visuospatial ability, andpsychomotor speed.To yet, the increased effect of co-use vs solo usage has not been properly investigated, thoughpreliminary researchsuggests that high alcohol consumption may be driving some of these effects.To know more aboutmarijuana:brainly.com/question/8340332#SPJ4Correct question:Alcohol plus ___________ increases drowsiness, confusion, and anxiety. A. marijuana B. antihistamines C. tranquilizers...