An arrested driver may be asked to submit to what type of test to determine the alcohol content in their blood?

The correct response is the chemical test, which encompasses a variety of methods used to measure a person's blood alcohol concentration (BAC). This can include breath tests, blood tests, or urine tests, all of which are classified as chemical tests. The term "chemical" indicates that these tests rely on chemical reactions to determine the presence and quantity of alcohol in the body.

Breath tests, specifically, are a common form of chemical testing conducted at the scene of an arrest, where a device known as a breathalyzer measures the alcohol content in expired air. However, when referring broadly to a type of test used to determine alcohol levels in a person's system, the classification as a chemical test is more encompassing and accurate.

Field sobriety tests evaluate a person's physical and cognitive abilities through tasks such as walking in a straight line or following a moving object with their eyes. While these tests are important in assessing a driver's impairment, they do not measure blood alcohol content directly. The blood pressure test is unrelated to alcohol concentration and serves a completely different purpose related to cardiovascular health.

Therefore, the broad term of chemical test correctly encompasses all testing methods that analyze alcohol levels in blood and other bodily fluids following an arrest for suspected driving under the influence.