Which of the Following Describes an Interesting Feature of the Reovirus

Which of the following describes an interesting feature of the reovirus virion?

A) It has two envelopes - one inner and one outer.
B) The envelope has icosahedral symmetry, same as the underlying capsid.
C) Each genome segment is wrapped into a helical nucleocapsid.
D) The capsid consists of two concentric shells, both with icosahedral symmetry.
E) The mature virion has open passages at each of the twelve vertices.