Aspecialist who diagnoses, treats, and prevents disorders and diseases of children is a/an
a. podiatrist.
b. oncologist.
c. pediatrician.
d. obstetrician.

The answer is letter C. 

Pediatricians are doctors who specialize in diagnosing, treating, and preventing disorders and diseases in children. This type of profession is a branch in medicine that still aims to focus on the same principles that other doctors have in their practice, except that the age of patients vary. They manage the physical, behavioral, and mental health of children the moment they were born up to the age of 21. They are well trained to diagnose a variety of minor and major diseases in children and identify noticeable traits that younger children cannot directly express through speaking.   

Ithink you should go with c

Maybe if you put away all your electronics and lock them with a key and give the key to some one you trust like your parents for about a month to stop the process