Direction: Given below is a sentence that may or may not be grammatically or contextually incorrect; different parts of the sentence are given as options. Choose the part that contains an error as your answer. If the sentence is error-free, mark option 5, i.e., 'No error,' as your answer.

Bernie Madoff's artful Ponzi scheme stolen billions of dollars from investors and is considered the largest financial fraud in U.S. history.