SAT Inferences Question

Pigments give paints and dyes their color. Ocher is a mineral-based pigment used to make several colors, including red. Red ocher gets its color from iron oxide. Pigments can also be plant-based; plant-based pigments contain a high level of carbon. In a 2023 study, archaeologists tested the red pigment on decorated beads made by members of the Natufan culture approximately 15,000 years ago. The test showed that the pigment found on severalbeads contained no iron but had a high levelof carbon.This finding led the researchers to conclude that Which choice most logically completes the text?