Question

how do we know the narrator from "Mrs.Dalloway," by Virginia Woolf, is told in the third- person omniscient?

Answer 1

If it uses words like "she, he, hers, his, theirs"  and it shows the feeling of more than one character.  third person limited would show only the feelings of one character.  first person would sue words like "i, mine, i'll".  So it would be third person omniscient if it shows the feelings of multiple characters and uses words like "his, hers, theirs," ect