Question

to what extent did the league of nations succeed in maintaining world peace?
it strengthened international relations and avoided all conflicts
it was hindered by the absence of key powers, like the u.s., and failed to prevent wwii.
it was entirely successful in preventing wars
it was only effective in asia

Explanation:

The League of Nations faced significant challenges. The absence of key powers like the U.S. weakened its effectiveness. It did not prevent all conflicts (so the first option is wrong as it says "avoided all conflicts") and was not entirely successful in preventing wars (so the third option is wrong). Also, it was not only effective in Asia (so the fourth option is wrong). The League's limitations due to the lack of major powers' participation contributed to its failure in preventing World War II.

Answer:

It was hindered by the absence of key powers, like the U.S., and failed to prevent WWII.