Answer the following question given this paragraph: 

Lead is still widely used in car batteries. In recent years, battery recycling is becoming very common - about 98% of car batteries a recycled today. The used batteries go to a processing plant where they are crushed and placed in a tank. The lead sinks to the bottom and can be separated, melted and used again. Plastic materials float to the top, are separated, and melted. The plastic can then be used in a number of applications. The battery acids are treated with chemicals to neutralize them before they are disposed of.


Q: What substances in a car battery can be melted and recycled?

 Choices:

- lead and steel

- lead and sodium

- steel and sodium

- lead and plastic

A:
lead and plastic
