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:
milk cheese soya bean tofu nuts
The Answer is A.The biceps muscle contracts while the triceps muscle relaxes. Only then can the forearm move up to lift the mug.
