Answer the following question given this paragraph: 

An ether is an organic compound in which two hydrocarbon groups are bonded to the same atom of oxygen. An ether is represented by the general formula R−O−R’. The R’ in the formula means that the hydrocarbon group can be the same as R or it can be different. The steps for naming ethers are listed below.


Q: An ether is an organic compound in which two hydrocarbon groups are bonded to the same atom of what?

 Choices:

- hydrogen

- sulfur

- nitrogen

- oxygen

A:
oxygen
