Question: You want to modify an existing index. What is the best way to do this?

1. Use the `reIndex()` command to modify the index.
2. Delete the original index and create a new index.
3. Call the `createIndex()` command with the update option.
4. Use the `updateIndex()` command.

Answer: The correct answer of the above question is Option B:Delete the original index and create a new index.