フリー問題

問題文

A producer sends a message and says nothing about how far the provider should go to keep it. Which mode takes over, and where do the two modes live?

選択肢

1. The mode that takes over is the one that leaves the message unguarded, and the two modes live as fields of that interface
2. The mode that takes over is the one that writes the message to storage, and the two modes live as fields of that interface
3. The mode that takes over is the one that writes the message to storage, and the two modes live as elements of that annotation
4. The mode that takes over is the one that leaves the message unguarded, and the two modes live as elements of that annotation