Final answer:
Do Not Contact (DNC) registries allow individuals to avoid telemarketing calls, protect their personal contact information, and serve as a regulatory measure with penalties for violators.
Step-by-step explanation:
The function of Do Not Contact (DNC) registries is to protect consumers from unwanted solicitations. One key aspect is that it helps individuals to avoid telemarketing calls by allowing them to register their phone numbers, indicating they do not wish to receive such calls. Another function of DNC is to give consumers control over their personal contact information, as businesses are legally required to refrain from contacting the numbers listed on the registry. Finally, DNC acts as a regulatory measure, enforcing penalties on organizations that violate the terms of the registry, thereby ensuring consumer privacy and choice are respected.