Final answer:
Gasoline is correctly classified as a flammable liquid, which means it can easily ignite and burn, and is derived from crude oil, used primarily as fuel in vehicles.
Step-by-step explanation:
Gasoline is a complex mixture primarily of hydrocarbons derived from crude oil. It is a key fuel used in internal combustion engines for automobiles and other vehicles. Gasoline's properties make it a flammable liquid, which means it can easily ignite and burn when exposed to a spark or sufficient heat. This characteristic makes it an effective fuel but also poses significant safety risks if not handled properly. Unlike a flammable gas, such as butane, or a reactive material like sodium, which must be stored under oil to prevent a reaction with air or water, gasoline is a liquid at room temperature and requires containment to minimize vapor escape. It is not classified as a poisonous and infectious material under normal usage conditions, although it can be harmful if ingested or absorbed. Therefore, the correct answer to the question is that gasoline is a B) flammable liquid.