I don't understand how the question answered in this manner:
As i know that EIGRP has AD lower than RIP so.. it should be the winner routing protocol
But in this attachment the answer changed i don't know why?!!!!!
The AD will only come into play when you have 2 identical routes going to the same destination.
I also want to make clear is not about sending advertisement but pay attention on what interfaces the routing protocol is enabled, on this case both serials only have RIP enabled. If you were to have
router eigrp 100
on both routers, EIGRP would be the predominant routing protocol.