B:
B : In the areas of epilation, the hair matrix including the dermal hair papilla that are the mother cells of the hair, and the connecting inner and outer root sheaths are severely affected.

C : Although some survivors suffered epilation as early as one week
after the bombing, the majority of cases occurred in the third week
thereafter. The epilation was often complicated by subcutaneous
hemorrhage. (The hair returned to normal in most survivors after 12
to 14 weeks.)
D : The frequency of epilation showed a close correlation with distance from the hypocenter, the number of cases increasing the closer the survivors were to the hypocenter at the time of the bombing.