This process is known as phosphorylation. Phosphorylation is the process through which a phosphate group is transferred from one molecule to a protein, usually within a biological system. A protein being phosphorylated - like drinking a soda before a workout- prepares a molecule for its specialized task.
Both A and B, because if you have bad posture you will have weaker bones which can make you get hurt easier plus weaker bones will not be safe especially if you got in a car wreck.
