Two planets orbit a star. You can ignore the gravitational interactions between the planets. Planet 1 has orbital radius \(r_{1}\) and planet 2 has \(r_{2}=4 r_{1}\). Planet 1 orbits with period \(T_{1}\). Planet 2 orbits with period

A. \(T_{2}=\frac{1}{2} T_{1}\)

B. \(T_{2}=2 T_{1}\)

\(\begin{array}{ll}\text { C. } T_{2}=4 T_{1} & \text { D. } T_{2}=8 T_{1}\end{array}\)