R1 router clock is synchronized with ISP router. R2 is supposed to receive NTP updates from R1. But you observe that R2

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R1 router clock is synchronized with ISP router. R2 is supposed to receive NTP updates from R1. But you observe that R2 clock is not synchronized with R1. What is the reason R2 is not receiving NTP updates from R1?

R1 Router Clock 1 (40.55 KiB) Viewed 48 times

R1 Router Clock 2 (42.18 KiB) Viewed 48 times

R1 Router Clock 3 (30.87 KiB) Viewed 48 times

R1 Router Clock 4 (19.63 KiB) Viewed 48 times

R1 Router Clock 5 (10.59 KiB) Viewed 48 times

R1 Router Clock 6 (23.2 KiB) Viewed 48 times

R1 Router Clock 7 (96.58 KiB) Viewed 48 times

R1 Router Clock 8 (13.24 KiB) Viewed 48 times

R1 Router Clock 9 (19.27 KiB) Viewed 48 times

R1 Router Clock 10 (16.99 KiB) Viewed 48 times

R1 Router Clock 11 (13.42 KiB) Viewed 48 times

R1 Router Clock 12 (17.23 KiB) Viewed 48 times

R1 Router Clock 13 (9.48 KiB) Viewed 48 times

R1 Router Clock 14 (19.89 KiB) Viewed 48 times

R1 Router Clock 15 (16.49 KiB) Viewed 48 times

R1 Router Clock 16 (13.11 KiB) Viewed 48 times

R1 Router Clock 17 (12.56 KiB) Viewed 48 times

A. The IP address that is used in the NTP configuration on R2 router is incorrect.
B. The NTP server command not configured on R2 router.
C. R2 router Ethernet interface that is connected to R1 is placed in shutdown condition.
D. R1 router Ethernet interface that is connected to R2 is placed in shutdown condition.