What type of tests are required if someone is suspected of driving under the influence?

The appropriate response involves understanding the comprehensive nature of testing procedures used when a driver is suspected of driving under the influence (DUI). In these situations, law enforcement is permitted to conduct blood, breath, and urine tests to determine a driver's level of alcohol or drug consumption.

Breath tests, commonly utilized for their convenience and speed, quickly assess blood alcohol concentration (BAC) levels. Blood tests are more intrusive but can provide more detailed information about alcohol and drug presence. Urine tests can also be used at times, especially when determining the presence of drugs that are not easily measured through breath tests.

Thus, by encompassing all three types of tests, the first choice offers a complete approach to evaluating a suspected DUI situation, solidifying its status as the correct answer. Other options are limited in scope, only addressing one or two forms of testing, which may not provide a full assessment needed for a conviction or legal proceedings.