Final answer:
Statement 3 should have semicolons to separate the items in the series.
Step-by-step explanation:
The statement that should have semicolons to separate the items in the series is Statement 3 only. In this statement, the items in the list are ingredients: Pepper, corn oil, tarragon, and sour grapes. Since each item is a list within itself, a semicolon is used to separate them.
Learn more about use of semicolons in a series