EIGRP and OSPF

Imagine that you are a network engineer tasked with implementing either an EIGRP or OSPF solution for your routers. Describe two (2) pros and two (2) cons for each of these dynamic protocols. Recommend the protocol that you believe is more reliable. Provide a rationale for your response.

Suppose you have configured your routers to use EIGRP with an autonomous system number of twenty-one (21). When trying to ping each of the routers, the ping is unsuccessful. After running show IP table on each of the routers, you notice that only one (1) out of three (3) routers shows that it is using EIGRP. Describe the possible problem(s), and provide a rationale to support your identification of such problem(s). Suggest the steps you would perform to troubleshoot and fix the issue.