The exhibit for this question contains a line from the file '/etc/passwd'. Which of the following statements is true, based on the information in the exhibit?
A. User John Doe belongs to the group with groupID 502.
B. Shadow passwords are used on the current system.
C. The username 'jdoe' belongs to the group 'jdoe'.
D. Members of groupID 1000 can read directory /home/jdoe.