What is the main method used for studying monozygotic twins that removes the confounding effect of parent-created environments?

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.

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i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.