According to the text, what did the speaker buy for their car?

The correct choice, new tires, indicates an investment in the car's performance and safety. Tires are crucial as they directly impact the vehicle's handling, braking ability, and overall safety on the road. When a speaker mentions purchasing new tires, it often suggests they are addressing wear and tear, improving the vehicle’s traction, or enhancing fuel efficiency, which indicates a proactive approach to vehicle maintenance.

In contrast, while options like a new engine, new battery, and new seats may also represent significant car repairs or upgrades, in this context, the focus is specifically on enhancing the car's operational aspects related to movement and safety. Therefore, the choice of new tires reflects a more common and immediate need compared to the other options, highlighting the importance of maintaining a vehicle’s ability to drive safely and effectively.