Answer the following question given this paragraph: 

Unsaturated hydrocarbons contain at least one double or triple bond between carbon atoms. Hydrocarbons with double bonds are called alkenes. Those with triple bonds are called alkynes. Aromatic hydrocarbons consist of six carbon atoms in a ring shape, connected by alternating single and double bonds.


Q: What are hydrocarbons with double bonds called?

 Choices:

- aldehydes

- alcohols

- amines

- alkenes

A:
alkenes
