Answer the following question given this paragraph: 

Ethanol and resveratrol, a phenol, are representatives of two of the families of oxygencontaining compounds that we consider in this chapter. Two other classes, aldehydes and ketones, are formed by the oxidation of alcohols. Ethers, another class, are made by the dehydration of alcohols.


Q: What class of oxygencontaining compounds is formed by the dehydration of alcohols?

 Choices:

- reagents

- sugars

- nethers

- ethers

A:
ethers
