Han applies option c- he is challenging the credibility of sources. Ramona ,surprised, asks him if the evidence from Pettit's book was from fictional sources. Hans supports his claim through a review of Giovanni Fiorini's book. The material from this book which had been written by a story-teller and not by a historian was used by Pettit.
Option a- is wrong. Hans is not determining new research goals. He is questioning the credibility of sources.
Option b-is wrong. Hans is evaluating what an author said about Giovanni Fiorini's book. The material from this 'great' source was used by Pettit in <em>his </em>book.
Option d is wrong. Ramona is asking clarifying questions. She wants Hans to justify his claim. This states that the credibility of sources can be questioned.
The story of Jonathan is from the novel "Civil Peace" which is a 1971 short story by Chinua Achebe. It is about the effects of the Nigerian Civil War<span> (1967–1970) on the people, and the "civil peace" that followed.
</span><span>The camp officials and soldiers have money to spare compared to Jonathan.</span><span>
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Mathematical sciences<span> is a group of areas of study that includes, in addition to </span>mathematics, those academic disciplines that are primarilymathematical<span> in nature but may not be universally considered subfields of </span>mathematics<span> proper.</span>
At first it almost seems to inform you but then it says they make wonderful pets.
So the answer I believe is "to persuade"
Hope this helps! Marking me the brainiest and leave a thanks is much appreciated. ;)