Which sentence best corrects the clause fragment?
A.When Thomas got a new bike for his birthday. He gave his old bike to his little brother.
B.He gave his old bike to his little brother. When Thomas got a new bike for his birthday.
He gave his old bike to his little brother, when Thomas got a new bike for his C.birthday. When Thomas got a new bike for his birthday, he gave his old bike to his little brother.
D.Thomas gave his old bike to his little brother. When he got a new bike for his birthday.