- Cardboard is inexpensive in cost
- Cardboard is recyclable
- Cardboard is a kind of material
- Cardboard is biodegradable
- So, cardboard is a material that is recyclable, biodegradable, and inexpensive in cost

Therefore, cardboard is a material that is recyclable, biodegradable, and inexpensive in cost
Question
A scientist working on a new package design wants to use a material that is highly recyclable, biodegradable, and inexpensive. The best material for the package design is

Context
- Cardboard is inexpensive in cost 
- Cardboard is recyclable 
- Cardboard is a kind of material 
- Cardboard is biodegradable