PLEASE PLEASE HELPPP. 9. In what situation does a charged object create an electric field? O A. A charged object always creates an electric field.
O B. A charged object creates an electric field when a positively charged test object is present.
O C. A charged object creates an electric field when a negatively charged test object is present.
O D. A charged object creates an electric field when a positively and negatively charged test objects are present.

Effect of rotenone and antimycin a on electron transfer rotenone, a toxic natural product from plants, strongly inhibits nadh dehydrogenase of insect and fish mitochondria. antimycin a, a toxic antibiotic, strongly inhibits the oxidation of ubiquinol. (a) explain why rotenone ingestion is lethal to some insect and fish species. (b) explain why antimycin a is a poison. (c) given that rotenone and antimycin a are equally effective in blocking their respective sites in the electron-transfer chain, which would be a more potent poison? explain.