Answer
B.
Work Step by Step
Normally centromeres detach at anaphase in mitosis, but this does not happen in meiosis I due to the different cohesins (B.) C. is wrong since centromeres cannot stay together through all of mieosis, and D. is wrong because the cohesins all detatch at the same time. A. can be excluded because microtubule attachment does not depend on the cohesins.