Free Cisco 200-901 Actual Exam Questions - Question 6 Discussion
DRAG DROP
Refer to the exhibit. Drag and drop the code snippets from the bottom to the blanks in the code to enable keepalive for the FastEthernet 2/0 interface. Not all options are used. 
I think B and C are the way to go here. B looks like the command that actually enables keepalive on the interface, and C sets the interval, which is essential for keepalive to work. D might just be showing the default or clearing counters, so it’s probably not needed. A doesn’t seem related to keepalive at all. So, B first to turn it on, then C to adjust the timer seems like the proper sequence and fits what the question asks.
C then D, since those set the keepalive interval and enable it properly.
C then D, those commands fit with keeping the interface alive settings.