What type of system combines a wet standpipe with an automatic sprinkler system?

The choice of a combination system is the correct answer because it effectively integrates both a wet standpipe system and an automatic sprinkler system. In this setup, the wet standpipe provides a continuous supply of water, while the automatic sprinklers are activated by heat or smoke. This combination enhances fire protection strategies, ensuring that both immediate water delivery through the standpipe for firefighters and automatic suppression through sprinklers are available when needed.

This integration is particularly advantageous in multi-story buildings where both rapid response and sustained water supply are critical for effective fire control. A dedicated water supply system would focus solely on providing water, whereas a separate alarm system does not include firefighting measures. A dry standpipe system, on the other hand, is designed for areas where water is not kept in the pipes due to freezing risks, making it unsuitable for the described combination with a sprinkler system.