Which configuration command allows a virtual router to receive updates from a configured NTP source?()<br /> <img src="https://nimg.ppkao.com/2018-08/gelingxia/2018080816543946816.jpg?sign=062360d1f6f736be0104124ef9bf0d6e&t=62d286b4" /><br /> <img src="https://nimg.ppkao.com/2018-08/gelingxia/2018080816544347058.jpg?sign=1b14a4a3476494bfdab31c07af988160&t=62d286b4" />
A、A
B、B
C、C
D、D