Straight there is there supposed to be a pic?
I believe the answer is: Conditioned response
Conditioned response refers to a learned response that happen after pairing a certain trigger with a certain situation. Since maria's is used to experience the feeling of more awake after consuming coffee, the smell of the coffee itself would trigger a certain response in her brain that change her bodily function to make her feel more awake.
Yes. if multiple officers are handling the gun with out gloves they are putting their fingerprints and dna on the gun which can either smudge other fingerprints and wipe other dna off