Ascientist who solves a new problem using something already learned is being

skeptical
creative
observant
curious

meteorologists would compare a new weather map with one 24 h old to see how fast a front is moving.

this would be a math

the answer is c most of the fortnite players usually buy v bucks to get the battle pass and other cosmetics but some players who are referred to as "no skins" don't   buy skins and are usually noobs.