A Primary School Age Boy Was Diagnosed with Myelogenous Leukemia

A primary school age boy was diagnosed with Myelogenous Leukemia. He is about to begin Chemotherapy and tells the nurse "I'm already 12 years old and I think I have the right to refuse the treatment". The nurse's most therapeutic response is:

A) "You are old enough. You're also old enough to understand that you need the Chemotherapy.
B) "You seem afraid. Let me talk to you about it".
C) Your father already gave his consent so we need to go on with the treatment".
D) Because you're under 18 years old, it means you don't have the capacity to refuse.