The answer is: <span>Ecological Succession
</span><span>If I managed to help you, please make sure to mark my answer as the "Brainliest" answer. Thanks! :)</span>
Answer:
You have not consumed lactose from dairy recently
Explanation:
According to the diagram, there is a represssor element in the regulatory region of the operon. This repressor is blocking the RNA polymerase, that is bound to its promoter region upstream of the genes, from transcription. The repressor is mostly the lac repressor that switches of the operon in the absence of lactose.
Probably B) strenuous exercise. If not B then it's probably A. I don't know for sure though