Select correct answer.

The doctor told Sarah: "You must stop eating peanuts or you will have bad allergy."

The doctor told Sarah that she had to stop eating peanuts or she would have bad allergy.

The doctor told Sarah that she had to stop eating peanuts or she would have bad allergy.

In the indirect speech, the modal verb must should be changed into had to.

The doctor told Sarah that she had to stop eating peanuts or she would have bad allergy.

In the indirect speech, the modal verb will needs to be changed into would.