How do you choose what MMA style to train in?

u of course need a ground style which most ppl pick BJJ (brazillian juijitsu) or another form of juijitsu. then u need a striking style, most ppl use mui thai. but anything would work, boxing, kick boxing, tae kwan do, karate, ect. each will teach u how to exicute the style onto another person as well as defend yourself against tht style. but the easiest thing 2 do is 2 find an academy/gym tht offers MMA. tht would b the best decision 2 make if u want 2 get into the MMA game, cut out the middle men.