I’m pretty sure it’s a but if not I’m very sorry I hope this helped tho!!:)
DNA is contained in blood, semen, skin cells, tissue, organs, muscle, brain cells, bone, teeth, hair, saliva, mucus, perspiration, fingernails, urine, feces, etc. Where can DNA evidence be found at a crime scene? DNA evidence can be collected from virtually anywhere.
The answer is b
But I need to make this answer longer so it will be AT LEAST 20 CHARACTERS LONG!!!!!,
It is used in measuring the humidity in the air or in gas