Need Help! Fill in the blank: Alleles - An allele that covers another allele.

Read the prompt and study the diagram above. what cause and effect prediction can be used to test the assumptions in the model? a) limiting water will limit sugar production of the plant b) limiting sunlight will limit sugar production of the plant c) limiting carbon dioxide will limit sugar production of the plant d) limiting sunlight, water, or carbon dioxide will limit sugar production of the plant