TOEFL Listening: TPO-TOEFL听力TPO - 1TB48SXXEXW0BB_5R$

According to the professor, how is the chemical telomerase related to the telomere? A. It resembles the telomere in structure. B. It helps repair broken telomeres. C. It is produced at the end of telomere. D. It prevents telomeres from becoming too long.