Diamond is exceptionally hard and does not allow electricity to pass through it. Which statement explains these properties?
- AIt has positive carbon ions surrounded by delocalised electrons.
- BIt has strong ionic bonds between each carbon atom.
- CIt has delocalised electrons, and each carbon atom forms three covalent bonds with other carbon atoms.
- DIt has no delocalised electrons, and each carbon atom forms four covalent bonds with other carbon atoms.