Final answer:
An imposed law on drivers under the age of 21 who have a BAC of .01 percent or more is called DUI, thus the correct option is 1.
Step-by-step explanation:
Driving under the influence (DUI) is a serious offense in most countries, and it refers to operating a vehicle while under the influence of alcohol or drugs. In this context, the term 'under the influence' means having a blood alcohol concentration (BAC) level above the legal limit. In most states, the legal limit for drivers under the age of 21 is .01 percent, which means that even a small amount of alcohol in their system can result in a DUI charge.
To better understand the implications of a BAC of .01 percent for drivers under 21, we need to do some calculations. First, let's consider what a BAC of .01 percent means. BAC is a measure of the amount of alcohol in a person's blood, and it is typically expressed as a percentage. So, a BAC of .01 percent means that there is .01 grams of alcohol in every 100 milliliters of blood.
Now, let's assume a hypothetical scenario where a 19-year-old driver has consumed two standard drinks (equivalent to 28 grams of alcohol) and is pulled over by the police. Since the legal limit for drivers under 21 is .01 percent, the driver's BAC would be .028 percent, which is well above the legal limit. As a result, the driver would be charged with a DUI.
It is important to note that a BAC of .01 percent or more is not the only requirement for a DUI charge. The driver must also exhibit signs of being impaired, such as weaving between lanes or failing a field sobriety test. However, having a BAC of .01 percent or more is considered strong evidence of impairment.
In conclusion, an imposed law on drivers under the age of 21 who have a BAC of .01 percent or more is called DUI. This law aims to discourage young drivers from consuming any amount of alcohol before getting behind the wheel, as even a small amount can impair their judgement and increase the risk of accidents. Therefore, it is crucial for young drivers to understand the consequences of driving under the influence and to always make responsible decisions when it comes to alcohol consumption, thus the correct option is 1.