Market Demand Is Given as Q_D = 220 - 3P

Market demand is given as Q_D = 220 - 3P.Market supply is given as Q_S = 3P + 40.Each identical firm has MC = 0.3Q and ATC = 0.2Q.What quantity of output will a typical firm produce

A) 2
B) 6
C) 60
D) 100