I can't afford a new car, so I'll have to buy a __ one.

• A. used
• B. secondhand
• C. preowned
• D. old

Answer: (A)

Not-new status and everyday language: the situation describes buying a car that isn’t brand new, so the natural, everyday choice is used. A "used car" is the standard way to say a vehicle that has had previous owners, without implying anything about its age beyond not being new. That neutral sense fits the idea of affordability and practicality.

The other options exist but vary in formality and nuance. "Secondhand" is correct but a bit formal or regional; "preowned" is often marketing language; "old" emphasizes age and can carry a negative connotation about condition. So the best fit for natural, common speech is "used."