An individual who is able to apply the most advanced type of reasoning and relies on universal values and principles is applying which level of ethical decision$-$making?

Question $15$ options:

a$)$

level $1$: preconventional thinking

b$)$

level $3$: postconventional or principled thinking

c$)$

level $2$: conventional thinking

d$)$

level $4$: graduated level of thinking