The histologic features being shown here has the following properties?

1. Can be seen in WHO grade IV gliomas.

2. Often associated with enhancement on imaging.

3. Usually associated with poor prognosis.

4. Seen in WHO grade V gliomas only.

A.  1,2, and 3 are true.

B.  1 and 3 are true.

C.  2 and 4 are true.

D.  4 is true.