Well, I think that maybe the answer is B or C. She shouldn't only look at her presentation while she is presenting it, that doesn't look professional, and you want to look at the people you are talking to.
Quality control is a system of maintaining standards in manufactured products by testing a sample of the output against the specification.
Answer:
I am explain you in image
The item you described is a skimmer it is oftem=n placed and left for an amount of time or watched from afar than when no on is looking they run-up and extract it for its data
