I would say A. Because c and d r very dangerous if u think about it. And b is right in some situations. But if u do a then people can see whts going on if something happened because of the light. and it is safe. If wrong let me know. :D
Answer:
C. a tool to measure the ratio of lean muscle to fat
Answer:
They must be cooled, wrapped in plastic or put into clean containers, and labeled.
Explanation: