He doubled up in her arms , then went limp . His body rolled over , his face wedging in the roots of a drift stump . Rin struggled to turn him over again ; small pebbles stuck to the bared front of his body . One hand still clamped over the broad smear of blood .

Question: Why has this person 's body gone limp ?
Answer: This person is full of energy .The person is experiencing a life threatening attack .This person is in a safe place .None of the above choices .