I think we need more information to thoroughly answer this question, but here is a small starter I did to hopefully help you out a bit :D
Overall, it makes things better because a MDC (More developed county) usually has more food, technology, etc and a LDC (Less developed country) is usually in more poverty + etc.
For both questions the answer is B.
Here is the answer of the given question above. The Athenian domination of the Greek world lasted for 27 YEARS. The Athens are also the ones who dominated the Delian League--the alliance of the Athens with other Greek city states as called by the modern scholars. Hope this is the answer that you are looking for.
<span>Because Priscus thought that the roman laws and constitution were fair.</span>
That the USSR would work to spread Communism.
