Task: Question Understanding
Input (English): Question: Diatoms are microorganisms that produce sugars through the process of photosynthesis. Diatoms are an example of a microorganism that is __________. (A) visible to the naked eye (B) disease-causing in humans (C) a primary producer (D) responsible for decomposition?
Output (English): Diatoms, produce, sugars, photosynthesis., Diatoms, example, microorganism