The most appropriate response to Ryan's confession is:
Irrespective of the reason, a theft is a crime.
This response recognizes the importance of ethical behavior and integrity in any context, including volunteer work. Regardless of Ryan's intentions or the perceived triviality of the items taken, taking items from the office without permission is still considered theft. Addressing this behavior is important not only for maintaining the integrity of the community office but also for helping Ryan understand the consequences of their actions.