[单选题]
A satellite is in a circular o/sfbua5:),6j:eibaa;dm n l g iwcp57 rrql+h;q km7jbi(+l.jkcb d )4e+*bj xbit of radius $R$ around a planet of mass $M$. Which of the following graphs represents the relationship between the centripetal acceleration of the satellite and its orbital radius?