"Marshall and Joe are brothers. Both are very interested in board games and both are very intellectual. Marshall is very kind and caring while Joe is a bit of a nerd. What is the role that genetics has likely played in the personalities of the two brothers? maybe some, after all, they probably grew up together A. everything, you are who you are B. most likely nothing, it is all about life experience C. probably little, genetics are a big factor D. even split, genetics and life experience have shaped them"