When a person alternately tenses their major muscles and then releases that tension is a process used in a) progressive relaxation
b) aerobic exercise
c) behavioral modification
d) aversion therapy

C. Behavioral Modification

it hurts at first because " the cherry is broken" which is a thin layer of skin that breaks so the first time girls have sex it hurts and it bleeds but after the first time it does hurt again because the skin that ia torn does not break again/ grow back.

answer leukemia,lymphoma,aplastic anemia;