[单选题]
98.24: A planet has a radius one-half thatl q8*yw /.hnc8xvqt 2t of Earth and: d2.j6-iiqnizpacl . a mass one-fifth the Earth’s mass. The gravitational acceleration at the surface of the planet i 6dz i .j2-qclai:pn.is most nearly
A. $4.0 m/s^{2}$
B. $8.0 m/s^{2}$
C. $12.5 m/s^{2}$
D. $25.0 m/s^{2}$
E. $62.5.0 m/s^{2}$
