Answer: A) The rate of photosynthesis would decrease and less glucose would be produced.
Explanation: Photosynthesis is a phenomenon in which green plants containing chlorophyll use sunlight as a source of energy to convert carbon dioxide and water to form glucose and oxygen.
Photosynthesis is the process used by plants, algae and certain bacteria to convert energy from sunlight and turn it into chemical energy in the form of glucose which is used a s a source of energy by many organisms.

Thus decreasing the amount of sunlight would decrease the rate of photosynthesis and less glucose will be produced.