Order the following events in quorum sensing by Staphylococcus aureus: 1. Exotoxin expression increases, while expression of surface adhesins decreases. 2. AgrB-D-C-A operon is expressed at low levels. 3. RNA III accumulates. 4. AgrD peptide is processed and secreted by AgrB, creating the mature pheromone. 5. Pheromone accumulates when population densities are high. 6. AgrC phosphorylates AgrA. 7. AgrA-P binds to promoters P2 and P3, activating both. 8. Pheromone binds to the sensory kinase AgrC. Group of answer choices