This statement is<span> jargon, </span>and jargon is the language used by certain professions, such as lawyers, doctors, etc.
So having this in mind, we can see that the sentence clearly used medical terms, so it has to be jargon.
Answer:
C, Is is the answer.
Explanation:
Would be is past tense,
Were too is past tense
Is is present tense and so is the sentence
Are does not sound right in the sentence
"Unsupported and exaggerated statements" would be something that best characterizes an unreliable narrator, but this is of course somewhat subjective.