How Do Kinetochore Microtubules Assist in the Process of Splitting

How do kinetochore microtubules assist in the process of splitting centromeres?

A) using motor proteins to split the centromere at specific arginine residues
B) creating tension by pulling toward opposite poles
C) sliding past each other like actin filaments
D) phosphorylating the centromere, thereby changing its conformation
E) attach the centromere to the nuclear envelope