What Evidence Suggests That the Assembly of DNA into Nucleosomes

What evidence suggests that the assembly of DNA into nucleosomes is a very rapid event?

A) Radiolabel is incorporated in a very short time.
B) Nucleosomes have a very unusual shape.
C) Electron micrographs of replicating DNA show nucleosomes forming on both daughter duplexes very near the replication fork.
D) Electron micrographs of replicating DNA show nucleosomes forming on both daughter duplexes at a large distance from the replication fork.
E) Nucleosomes are twice as big near the replication fork.