For the average American to watch a particular television program without constant interruption as the satellite carrying this program dips below the horizon, the satellite must execute uniform circular motion at a radius of RG$.$ Which of the following is the correct expression for the acceleration of the satellite?

Select one:

a$.$

$4$$2$RG$(24$h$)2$

b$.$

$4$$2$R$2$G$(24$h$2)+$aT

c$.$

R$2$G$(24$h$)2$

d$.$

$2$R$2$G$(24$h$)2$