What mainly separates craft beer from mass-market beer?

Answer: More malt and hops vs cheaper fillers

More malt and hops vs cheaper fillers ✓ — Correct! Craft beer generally uses more malt and hops and fewer cheap fillers like rice or corn, made at smaller scale for flavor over consistency. Note: this is about ingredients and intent, NOT ale vs lager — there are superb craft lagers and plenty of mass-market ales. And pricier doesn't always mean better.

Craft beer has no alcohol limit — Wrong. There's no special alcohol rule for craft beer. Strength depends on the recipe; both craft and mass-market beers span a wide range.

Mass beer skips fermentation — Wrong. All beer is fermented — that's how it becomes beer. Mass-market beer is fully fermented; it just often uses cheaper ingredients and aims for a light, consistent taste.