問題文
The page on extending the component names one class in its service provider package that exists purely as a help. Which job does the page give that class?
選択肢
- It helps a writer build a provider that reports its own health beside its own work.
- It helps a writer build a provider that reads its settings out of a written file.
- It helps a writer build a provider that answers in step with a call as it comes.
- It helps a writer build a provider that keeps a store of past replies between calls.