[单选题]
00.08: A pendulum is pulled to one side and released. It swings l 6(19 x6oqg1jaisvf gfreely to the opasg 9o(6fi x1g6lq1j vr0s5*yh/bl ;-doj hjuxi -:svposite side and stops. Which ov lb-j -ys;u0jd5 r hi/:sh*oxf the following might best represent graphs of kinetic energy $E_k$, potential energy $E_p$ and total energy $E_T$?