Question HLPaper 1AAnswerThe π+\pi^{+}π+ meson contains an up ( uuu ) quark. What is the quark structure of the π−\pi^{-}π− meson?AudBudˉu\bar{d}udˉCuˉd\bar{u}duˉdDuˉdˉ\bar{u}\bar{d}uˉdˉ