How many possible "N11" codes are there?

The correct answer is eight because "N11" codes are a specific set of three-digit telephone numbers that are used for various services. In the case of "N11" codes, the first digit is fixed as 'N' and the following two digits can be any number from 1 to 9, following the North American Numbering Plan.

The specific "N11" codes recognized include 211 (Community Services), 311 (Non-emergency Police), 511 (Traffic and Weather), 711 (Relay Service for the Hearing Impaired), 811 (Underground Utility Location), 911 (Emergency Services), 111 (Reserved for future use), and sometimes 611 (Telephone Company Repair Service) is included, depending on regional variations. Thus, this totals to eight distinct codes utilized for specific purposes, confirming that option B is indeed the correct choice.