Which of the following statements best describes the relationship between a logical volume and a journaled file system (JFS)?（）

A.Increasing the size of a logical volume also increases the size of the file system

B.Reducing the size of a logical volume requires reducing the size of the file system first

C.Increasing the size of a file system requires increasing the size of the logical volume first

D.Increasing the size of a file system also increases the size of the logical volume when necessary