Respuesta :
I think the correct answer from the choices listed above is the third option. It is an outbreak of psoriasis that is not a possible indicator of a biological agent. Hope this answers the question. Have a nice day. Feel free to ask more questions.
Answer: Outbreak of psoriasis
Explanation:
The out break of psoriasis is caused due to the weak immune system which is enhanced during certain weather condition. Other conditions can also increase the susceptibility towards this disease such as certain medications, dry weather conditions et cetera.
Other reasons such as abandoned spray device, unusual sickness of people, unscheduled and unusual spray being disseminated. These activities are possible indicator of biological agent.