Final answer:
To freeze microtubules, b)taxol is used, which stabilizes microtubules, preventing their depolymerization, and therefore halting cell division at anaphase and telophase by targeting the mitotic spindle.
Step-by-step explanation:
If one wanted to freeze microtubules, the appropriate drug to use would be taxol. Taxol acts by disrupting the equilibrium between free tubulin and microtubules by promoting assembly rather than disassembly, leading to the stabilization of microtubules and the formation of abnormal bundles. While other chemotherapy drugs like vinblastine, vincristine, and colchicines work by binding to tubulin and preventing microtubule formation or function, thus inhibiting mitosis, taxol has a unique effect by preventing microtubules from depolymerizing, which arrests mitotic anaphase and telophase. These drugs target the mitotic spindle, which is necessary for chromosome segregation during cell division, and as such, they have the effect of stopping cell division.