According to the Texas manual, how do typical social doses of marijuana affect a driver?
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A.
Only heavy or long-term users show measurable impairment
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B.
Effects wear off within a few minutes of driving
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C.
Reaction time slows, but other skills are unchanged
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D.
Concentration, judgment, and perception are affected Correct
The answer is "Concentration, judgment, and perception are affected"
The manual states that even social-level doses of marijuana affect concentration, judgment, and perception. A rests on the casual-conversation belief that only heavy or long-term users show impairment, a folk assumption the manual specifically rejects by attaching the impairment to typical social doses.
The traps in the wrong answers
A. Only heavy or long-term users show measurable impairment
The manual attaches the impairment to typical social doses, without a duration or frequency threshold. This answer assumes an occasional user has built no impairment yet, a belief drawn from casual conversation rather than the manual.
B. Effects wear off within a few minutes of driving
The manual describes the impairment as present during use, not something that dissipates quickly. This answer reasons from how a driver feels the peak fading and assumes the driving-safety picture fades at the same rate.
C. Reaction time slows, but other skills are unchanged
The manual lists several affected skills, not reaction time alone. This answer applies the 'slower reflexes' shorthand people use for every substance instead of the multi-skill list the manual prints.
This question tests your knowledge of DUI & Impaired Driving in Texas. Source: Texas Driver Manual, "Table 25: Alcohol and Other Types of Drugs," p.55..
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