Which of the following would most likely increase the rate of photosynthesis? A. Decreasing the temperature within the plant's environment B. Decrease the availability of water to the plant C. Exposing a plant to a higher light intensity D. Changing a plant's light source to a lower brightness

The correct answer is C - out of the following answers listed here, the option that is most likely to increase the rate of photosynthesis would be exposing a plant to a higher light intensity. This is because it would mean that more light will cause a faster reaction time within the cells that rely on light to begin the photosynthesising process.