Final answer:
Off-network syndication refers to older programs that are no longer aired during prime time on networks, such as a show like 'Friends', which is then sold for reruns on other stations or networks.
Step-by-step explanation:
Programs that are in off-network syndication are B) older programs that no longer run during network prime time. Syndicated programs are series that were originally produced and aired on a network or cable channel and, after their initial run, are sold to individual stations or other networks for reruns. Unlike programs made specifically for syndication, which are produced with the intention of being sold to various networks from the start, off-network syndicated shows are those that have already completed their primary broadcasting cycle on their original network.
For example, a show like 'Friends', which first aired on NBC during its original run, became available for syndication after it completed its network airings. Such shows often find a new audience and can continue to generate revenue through advertising, even though they are no longer part of the current network prime time lineup.