Final answer:
The correct option is b. The interdental brush is the best tool for bacterial plaque disruption on interproximal surfaces in areas with type III embrasure spaces.
Step-by-step explanation:
The BEST tool for bacterial plaque disruption on interproximal surfaces in areas with type III embrasure spaces is interdental brush. Unlike floss holders, dental tape, and dental floss, interdental brushes have bristles that can reach into the spaces between teeth and effectively remove plaque.
They are especially useful for people with larger gaps between their teeth. The interdental brush is the best tool for bacterial plaque disruption on interproximal surfaces in areas with type III embrasure spaces.