When mr. utterson says that he "inclines to cain's heresy," this reveals that he is non-confrontational extravagant non-judgmental merciful?

The answer is C: Non-judgmental.

Mr Utterson, the narrator in R.L. Stevenson´s novel, The strange case of Dr. Jekyll and Mr. Hyde, pronounces this sentence early in the novel, referencing the famous passage from Genesis, when Cain murders his brother, Abel. In an ironic way, Mr. Utterson´s remark comes to mean in the novel that, as narrator and character in this work of fiction, he does not judge the actions of others and is content to let them be as they please, even if dissolute or morally impaired.

that is true because that is something they fulfill for their work.