Explanation:

- Option 1: "a lot of" is grammatically correct. It is a commonly used phrase to indicate quantity or extent.

- Option 2: "work today" is also correct. It indicates the work was completed on the same day, providing a clear time frame.

- Option 3: "she said" is correct. This is a proper way to attribute dialogue to a speaker.

- Option 4: "I done" contains the error. The correct phrase should be "I have done" or "I did" to maintain proper verb usage.

Option 4: I done