In a recent study, two scientists, Dr. A and Dr. B, proposed different hypotheses regarding the impact of light intensity on the growth rate of a specific plant species, Plantus acelera. Dr. A hypothesized that increasing light intensity would lead to a linear increase in the growth rate of the plants. In contrast, Dr. B proposed that after a certain threshold of light intensity, the growth rate would plateau regardless of further increases in light intensity. To test these hypotheses, both scientists conducted experiments under controlled environments, measuring plant growth at varying light intensities for several weeks.

Based on their findings, which hypothesis about the relationship between light intensity and plant growth is supported by the data collected from the experiments?