What type of weapons does TC 3-22.9 primarily address?

TC 3-22.9 primarily addresses both individual and crew-served weapons, which is why this option is correct. Individual weapons include small arms like rifles and handguns that are operated by a single soldier. Crew-served weapons involve a group of soldiers working together to operate systems like machine guns or mortars. This comprehensive approach is essential because it recognizes the various roles and responsibilities soldiers may encounter in the field, addressing the skills required to operate both types of weaponry effectively.

Other options are too narrow in scope. The choice that limits the focus to only individual weapons ignores the importance of training for crew-served systems, which are critical for team-based operations. Similarly, the exclusive focus on rifles and handguns disregards the wider variety of weapon systems that soldiers may need to engage with. Finally, the choice that limits the training to weapons used solely in urban warfare excludes many contexts in which soldiers may deploy their skills and weaponry, such as in open terrain or other operational environments. Thus, the correct answer reflects the broad spectrum of capabilities soldiers must master according to TC 3-22.9.