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 .

Q with options: Give answer the following question using evidence from the above passage: Why was Rin unable to turn him over ?
Available choices:
i. He was trapped in a video game type " freeze " .;
ii. None of the above choices .;
iii. He had someone elses blood on him and did n't want to get anything else bloody .;
iv. He was heavy and difficult to move and was unable to move on his own .;
iv.