A 30 year old male presents to OPD with sensitivity to cold water. On intraoral examination, 36 is carious. When both a cavity varnish and a polycarboxylate cement base are being used in conjunction with a dental amalgam restoration, then the cavity varnish should be:
A
Applied to the pulpal wall only
B
Kept well away from the enamel margins
C
Applied to the cavity preparation after placing the base
D
Applied to the cavity preparation before placing the base