Pesticides are A. Always highly toxic to humans B. All synthetic chemicals C. Always the best weapon against insect pests D. All of the above E. None of the above

E==> none of the above.

Explanation:

Pesticides are chemicals that is being manufactured for the purpose of killing and harming the existence of pests and weeds(that is unwanted plants). Pesticides are also used to control disease I animals that we rear. Pesticides can be biodegradable and they might be persistent chemicals that takes a very long time before they break down.

Yes, most pesticides are highly toxic to Humans but not all such as Insecticidal soaps. Insecticidal soaps are less toxic. Also, not all pesticides are synthetic there are some that are naturally made such as neem cakes.

There are other good ways to prevent pest apart from using pesticides which might be harmful to humans. So the best option will be option "E" none of the above.