Geologists can use a radioactive isotope's to help determine the age of some rocks. A. half-life B. growth rate C. double-life D. all of these

there really is life in the deepest part

substitution is the answer in this case

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.