Students perform an experiment on a type of mushroom that grows in animal waste. the mushroom forms thin stalks at the tip, which release spores into surrounding grasses and other plants. the experiment uses mushrooms growing in culture dishes. the students grow the mushrooms in different light conditions, as shown in the diagram. what conclusion can be drawn from the student’s results? a) the stalks grow toward the gravitational force. b) spores allow the fungus to carry out photosynthesis. c) light is required for the spore-bearing stalks to grow. d) the stalks grow toward light to release spores into the air.