The File class:

a. has only instance members, so to call one of its methods you must have an object

b. has only instance members, so to call one of its methods you must use the class name

c. has only static members, so to call one of its methods you must have an object

d. has only static members, so to call one of its methods you must use the class name

e. has only static members, so to call one of its methods you must use an instance member