Which of the following drugs is toxic for our cells?

A) Cytochalasin B, which caps the plus end of actin filaments and prevents actin polymerization.
B) Phalloidin, which binds along actin filaments and stabilizes them.
C) Nocodazole, which binds to tubulin subunits and prevents microtubule polymerization.
D) Colchicine, which caps microtubule ends and leads to their depolymerization.
E) All of the above.