The Client Recently Diagnosed with Tuberculosis Asks the Nurse Why

The client recently diagnosed with tuberculosis asks the nurse why family members also will be treated.On what facts does the nurse base the response?

A) The medication for the family is preventative.
B) Smaller doses now will prevent side effects should they need the medication in larger doses later.
C) The medication will increase the family members' immune response.
D) The family members will get the disease,and treatment must begin early.