フリー問題

問題文

A site keeps one circuit unused so that it can take over. The designer says the design is not finished until one more thing is done regularly. Which activity is that?

選択肢

1. The recurring activity is regular failover exercising before any of the unused circuit recommendations.
2. The recurring activity is permanent idle billing before any of the unused circuit recommendations.
3. The recurring activity is lifecycle phase sequencing before any of the unused circuit recommendations.
4. The recurring activity is manual weight editing before any of the unused circuit recommendations.