Relation candidate keys

Question

I have the following relation:

R = ABCDE
F: AB->DE, AC->B, DE->C, AE->C, C->AB

I need to determine this relations candidate keys.

Now, if I understood the defintion correctly:

In the relational model of databases, a candidate key of a relation is a minimal superkey for that relation; that is, a set of attributes such that the relation does not have two distinct tuples

The candidate keys would be: C, AB, AE, DE.

Is this correct or are there more?