What is the main structural difference between enveloped and nonenveloped viruses?

What is the main structural difference between enveloped and nonenveloped viruses?
A) Enveloped viruses have their genetic material enclosed by a protein or phospholipid coat.
B) Nonenveloped viruses have only a phospholipid membrane, while enveloped viruses have two membranes, the other one being a protein capsid.
C) Enveloped viruses have a phospholipid membrane outside their capsid, whereas nonenveloped viruses do not.
D) Both viruses have a capsid and phospholipid membrane, but, in the nonenveloped virus, the genetic material is between these two membranes, while in the enveloped virus the genetic material is inside both membranes.