The Zinc Atom at the Centre of the Zinc Finger

The zinc atom at the centre of the zinc finger motif is held in place by which one of the following?

A) Hydrogen bonds between the zinc atom and neighbouring amino acid side-chains
B) Disulfide bonds between the zinc atom and neighbouring amino acid side-chains.
C) Ionic bonds between the zinc atom and neighbouring amino acid side-chains.
D) Coordinate bonds between the zinc atom and neighbouring amino acid side-chains.