Agents are prohibited from making cold calls to numbers listed in which registry?

The correct option is related to the National Do-Not-Call Registry, which is established to protect consumers from unwanted telemarketing calls. This registry allows individuals to opt-out of receiving sales calls from telemarketers and is enforced by the Federal Trade Commission (FTC) in the United States. When a number is registered on this list, telemarketers, including agents, are legally required to refrain from making calls to that number, thereby helping to respect the privacy of consumers.

In contrast, the other choices do not reflect valid or recognized registries that impose similar restrictions. The National Call Directory, National Telemarketing Registry, and National Privacy Registry are not official registries that prohibit cold calls like the National Do-Not-Call Registry does. Therefore, the requirement for agents to avoid making cold calls to listed numbers applies specifically to the National Do-Not-Call Registry.