Which of the Following Facilitates Breakdown of the Nuclear Envelope $\mathrm{G}_{1}$

Which of the following facilitates breakdown of the nuclear envelope during the onset of mitosis?

A) Disassembly of nucleosomes in the associated constitutive heterochromatin
B) Increased export of material by the nuclear pore complexes into the perinuclear space
C) Phosphorylation of lamin subunits by a CDK
D) Activities triggered at a restriction point late in $\mathrm{G}_{1}$
E) The activity of proteasomes