SAT English Practice Question

While reading a historical article about the early days of the automobile, you encounter the following sentence: "The Wright Brothers, who are famously known for their first successful airplane flight, also designed and built a car that was an early example of an automobile."

1. A.who famously are known for their first successful airplane flight
2. B.who are famously known for their first successful airplane flight
3. C.famously known for their first successful airplane flight,
4. D.famously known for their first successful airplane flight