What can create/develop an authors tone in writing?

Read the passage. “ah, are you digging on my grave my loved one? —planting rue? ” —“no: yesterday he went to wed one of the brightest wealth has bred.” in “ah, are you digging on my grave? ” by thomas hardy, what has happened to the dead woman’s widower? he has moved away. he has remarried. he has come to visit. he has died.

Even the insistent cough of the woman next to him wasn't enough to draw his eyes away from the tiny type of the ancient book its pages were brittle and felt like they could crumble at the slightest disturbance he noticed the musty odor if each page as he carefully it over.

Third-person omniscient narrators are likely to be reliable because they're impersonal and know everything about the story they don't care enough about the characters to lie none of the above both "a" and "b"