Which statement about covalent catalysis is true?
A covalent catalysis pathway is always faster than a pathway without covalent catalysis.
Covalent catalysis rarely works, since it increases the number of steps in a reaction.
Covalent catalysis yields different products than the normal reaction without covalent catalysis.
Covalent catalysis works when all steps have lower activation barriers than the steps in the normal uncatalyzed reaction.