Which physical abilities start to degrade at a BAC of .12%?

The correct answer encompasses a range of physical abilities that can be significantly impacted at a blood alcohol concentration (BAC) of .12%. At this level of intoxication, an individual typically experiences noticeable impairment in several critical areas.

Firstly, speech can become slurred, making it difficult for individuals to articulate their words clearly. This is often one of the first signs of alcohol impairment and is a crucial indicator of one’s level of intoxication. Secondly, vision is affected as alcohol can lead to blurred or distorted sight and may impair the ability to focus. This impairment can increase the risk of accidents, particularly while driving. Finally, balance is compromised as alcohol affects the vestibular system in the inner ear, which is responsible for maintaining equilibrium. Together, these three abilities—speech, vision, and balance—are heavily impacted at a BAC of .12%, contributing to an overall decline in motor skills and coordination.

While the other options mention important physical abilities that also begin to degrade with rising BAC levels, the focus for this specific question lies in the combination of speech, vision, and balance, which can deteriorate noticeably even at lower BAC levels. This makes the selected option a relevant choice as it directly addresses the impaired physical abilities at .12%.