When dialing direct, the caller dials;

The correct answer is that when dialing direct, the caller dials 1 + area code + seven-digit number. This format is standard for making long-distance calls within North America. By including the "1" before the area code, the caller indicates that they are making a long-distance call, which helps the phone system understand that routing may be required to reach the intended destination.

In contrast, other options propose different formats that serve different dialing purposes or refer to specific types of calls, such as toll-free numbers or local calls where the area code might not be necessary. Therefore, the format of dialing "1" followed by the area code and the seven-digit number is essential for ensuring the call connects correctly across long distances.