According to the inoculation hypothesis of childhood adversity...

A. early exposure to stress causes physiological and psychological changes that impede the ability to cope and cause children to be more vulnerable to the negative impact of adversity later in life

B. early exposure to stress allows children to develop and practice coping strategies that help them manage adversity better later in life

C. early exposure to stress has no impact on a child's ability to manage adversity later in life

D. early exposure to stress impedes immune system functioning, reduces the efficacy of childhood inoculations, and increases the risk for chronic illnesses later in life