Refer to the exhibit. This exhibit shows the NAT configuration for Router A and the output for a ping issued from device 171.68.200.48 and destined to 172.16.47.142. Based on this information， what change must be made to Router A in order for the ping to work？（）

A.reload the router
B.clear the route cache
C.add a static route
D.configure IP as classless
E.load a newer IOS image