<em>D.
</em>
<em>by telling dramatic, engaging stories about the lives and works of ancient astronomers</em>
C i think Hope this helps
To build motivation for the character gives a backbone to the story and about the Arthur for example if the Arthur got the motivation from seeing a kid take a candy out of a store that motivation for that character would be a bad guy or a heel and or antagonist there for the motivation for a character is very important they reveal it so you can get a bit of a background on the character in more information on the story and the Arthur.
It could possible be ironic because the rest of the world was technically already "discovered", but just not by the Europeans specifically. Therefore it is ironic, simply because they are Naive
