Which of the Following Statements Is True If the UID

Which of the following statements is true if the UID of a regular user is identical to the GID of a group?

A) UID have precedence over GIDs, therefore the user is available while the group doesn't.
B) The user as well as the group are not available to avoid ambiguity due to the ID conflict.
C) UIDs and GIDs are independent of each other, therefore the user as well as the group are still available.
D) The user is the only member of the group, even if the group configuration contains other members.
E) GIDs have precedence over UIDs, therefore the group is available while the user isn't.