Where is a chemical test for drunk driving administered?

A chemical test for drunk driving is typically administered at the jail or hospital, depending on the suspect's location, to determine their blood alcohol concentration (BAC). This is usually done through a breathalyzer test or blood test. Option A, a designated police facility, is incorrect because while a police station may have the necessary equipment for testing, it is not the only location where the test can be administered. Option B, on the spot where the driver was stopped, is also incorrect as this would require the police to have the necessary testing equipment readily available at the location of the traffic stop, which is not always the case. Option D, a medical laboratory, is incorrect because it is a more time-consuming and expensive option compared to testing at a jail or hospital. Therefore, the most common and practical location for a chemical test for drunk driving is at the jail or the hospital, making option C the correct answer.