Hiding behind the walls of Manji 's sarcastic stoicism never seemed to work for her anyway - she might have known better by now . Emotion dogged her heels , pursuing her almost faster than she could walk . In a rocky , fast - running spot Rin weighted Manji 's kosode with stones to let the water flow through it , sat on the bank nearby while cleaning out her shoulder bag and wept for an infant ghost until her eyes burned .

Question: Why would Rin weight Manji 's kosode with rocks in the fast moving stream ?
Answer: Because rocks will make the kosode float under water and clean it well .Because rocks will make the kosode sink and prevent the cleaning .Because rocks will make the kosode sink under water and clean it well .None of the above choices .