Addiction is often viewed as a(an) disease.

 The choices are A. Chronic B. Fleeting C. Imaginary D. Simple. The answer is a Chronic disease. Addiction is a developmental disease it naturally starts in childhood or adolescence.  The critical part of an adolescent brain is still a work in progress and puts the person at risk for making poor decisions. Negative effects of prenatal drug exposure on infants or children negative effects on second-hand smoke increased the spread of transferable diseases. 

answer; i believe that the correct answer is (light);

this protocol describes a detailed procedure for intracellular flow cytometry staining.