I believe the answer is D mainly based off the wording. The question says "Devices" And the only answer with devices involved would be D, Personal protective equipment.
49.. 10 minutes of walking
50.68
I believe that is true.
"Fibrin strands form a net that entrap more platelets and blood cells, producing a clot that plugs the break." -Google
The answer is Positive or negative depending on the circumstances, whether between a serious illness where someone needs medical attention and has noticeable symptoms or they can be faking it which would relate to a mental disorder.
I hope this helps
It's peer pressure, boredom, and the choice to fit in with other teen peers from school.