a. the appeal of Christianity among all social classes of Europe.
Not:
Invasion of Poland
Nazi-Soviet Non-Agression Pact
Pearl Harbor
Munich Conference
The rest are all associated with WW1
hope this helps
346.5 acres (0.54 sq mi; 140.22 ha)
<span>1,966.5 acres (3.07 sq mi; 795.81 ha) - wiki</span>
B. Hydroelectric.
(Edit: Why did you ask the question if you had the answer?)
Is it multiple choice? I think it would be graph because a graph contains all of those things.. I’m sorry I don’t know more I hope this helps!