The following table shows the current state of a relation, where C is the key of the relation. Which of the following options are correct? (Select all correct choices) C C C 1 1 2 1 3 4 5 6 1 2 23 C4 Cs George Anna 42 George Chris 42 George Anna 42 John Nek 2 John Chris 1 Marina Anna 3 Select one or more alternatives: We cannot be certain whether the functional dependency C C3 holds. The functional dependency {C3, C4) C5 may hold. All attributes are functionally dependent on C. The functional dependency C3 C4 may hold. The functional dependency C3 C, may hold. The functional dependency C C4 holds.