Telomeres have at least two roles in chromosome integrity.Telomeres are composed of repeat sequences homologous to the RNA in telomerase used to replicate chromosome ends.Second, they

A)allow the chromosome to shorten each generation to speed up replication.
B)interact with shelterin complexes that protect chromosome ends from degradation.
C)permit the hairpin turn at the end to be cleaved.
D)carry genes needed for DNA replication.