Contraindications to Sealant Placement Include Proximal Decay,because

Contraindications to sealant placement include proximal decay,because:

A) proximal decay will spread to the occlusal surface.
B) posterior proximal tooth preparation will usually include the occlusal pits and fissures.
C) sealants are placed on smooth surfaces and the proximal area is a smooth surface.
D) sealants are placed on smooth surfaces and the proximal area is a rough surface.