strength build up in your legs and arms,running and doing pushups
oh hello again, it is mentally impossible (unless you suffer severe brain/head injury) to forget everyone and everything. your brain is constantly taking mental photos of everyone and everything you see, you will always recognize someone you have seen a while ago even if its by the slightest. That probably wasn't my best wording, my brain is fried ☠.
The serving size (A) is the pre-determined portion on the nutrition label
Most of the time when all of the above is an option the answer is usually all of the above
No, if the minor is not the correct age to have it they can't it would be illegal even if the other person is not a minor.