He was a self-centred child and, accepting the commercial traveller fiction

He was a self-centred child and, accepting the commercial traveller fiction, dismissed the subject from his mind and busied himself with things of more moment.
(a) ‘More moment’ here means
(b) Explain the sentence ‘accepting the commercial traveller fiction’.
© Which subject is regarded as trivial?

(a) More importance
(b) ‘Accepting the commercial traveller fiction’ means that Harold believed the story of Bill being a commercial traveller,
© The subject which is regarded as trivial by Harold is his father’s profession.