Diagrams X, Y and Z show part of a polymer and two giant covalent structures. Which of X, Y or Z could serve as a cutting tool, and which of X, Y or Z could be used to lower friction?
- Acutting tool: X, reduce friction: Y
- Bcutting tool: Y, reduce friction: Z
- Ccutting tool: Z, reduce friction: X
- Dcutting tool: Z, reduce friction: Y