Please explain your selection.
Let's apply some simple concept to eliminate wrong options.
1. We should use "such as" not "like" to provide examples. We can remove option B and E.
2. Let's assume we don't know whether "What" or "something" should be used. Try with meaning of sentence. Success of program has stimulated experts to pursue that better control was at least possible, if not eradication of measles and yaws infections. so one thing is clear that "of the other infections" can be replaced with "infections" without altering the meaning of sentence . So option A is also gone.
Now we remain with C and D.
D says both better control and eradication were not considered possible that is not what original sentence delivers so answer is C.If you think my post helped you then please give me kudos.
"Giving kudos" is a decent way to say "Thanks" and motivate contributors. Please use them, it won't cost you anything.