When none of the characters are true, but the setting may be true, and what happens in the story actually happened in real life (at least some- most of it)
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"Unsupported and exaggerated statements" would be something that best characterizes an unreliable narrator, but this is of course somewhat subjective.
Sentiences 3 and 8 because they express emotional thought other than fact. For sentence three, using "terrible waste" can be debateable and shows more of an opinion. And sentence 8, by using "shouldn't" showing its still a posssiby something can or can not happen.
Answer:
Gatsby produces a medal from Montenegro and a picture of himself playing cricket at Oxford.
Explanation: