The Stillwater Marsh Burial Population Had a Remarkably Low Percentage

The Stillwater Marsh burial population had a remarkably low percentage of dental caries because:

A) grit from plant food ground on metates was incorporated into their diet; this grit acted as a natural abrasive and helped to clean their teeth.
B) they ate very little meat, largely subsisting on maize agriculture.
C) they were strictly hunter-gatherers, and so their diet was very low in simple carbohydrates and starches.
D) None of the answers; the Stillwater Marsh burial population had an extremely high percentage of dental caries because their diet was high in carbohydrates.