When using a translator in a medical environment, the practitioner should?

The translator/interpreter must fulfill the following conditions:

a)The interpreter must accomplish all the set of standards of practice

b)Must introduce all the conflicts of interest to the patient and the terms and conditions of withdrawing.  

c)Must be able to maintain the confidentiality

d)Also the translator should not only understand and speak the native language of the patient but the dialect of the language must be same for ease of understanding.  

looks like the answer is     c     to me!