Two satellites are in circular orbits around Earth. Satellite A has speed $v\_{A}$. Satellite B has an orbital radius nine times that of satellite A. What is the speed of satellite B? 
选项为:A:$v\_{A}$/9  B:$v\_{A}$/3  C:3$v\_{A}$  D:9$v\_{A}$  请回答其中一个选项.