Visual exam to evaluate propensity to occlusal caries (early detection of fissure caries):

For early OCCLUSAL CARIES detection, FIBER-OPTIC TRANSILLUMINATION (FOTI / DIAGNOdent) allows visualization of the enamel translucency/opacity to detect incipient lesions before cavitation. TRANSILLUMINATION helps detect demineralization in the subsurface enamel. An explorer CATCH indicates cavitation (already progressed). Brown staining can indicate old/arrested caries or just stain. Deep fissures are a RISK FACTOR morphology, not a caries detection method. Transillumination is the most advanced visual detection tool. A is correct.