If the bold sentence is in fact As he tells the story he never smiles, and he never frowns",then it is most likely the human foible due to it being an interesting characteristic. We can also determine this answer through process of elimination if we know the meaning of hyperbole, and "funny name".
Hyperbole is an exaggeration and is not normally meant to be serious, and in the case of your summary, I believe this line is meant to be taken serious. This doesn't seem to be a funny name reference, so your only option is human foible.
The answer is C. Suspenseful and terrified. Why? because the writer is explaining it in a scary way of how she grabbed him by the shirt and shook him so hard that his teeth could have fallen out.
His mouth swimming means his mouth was watery
His clowning grin means he was foolish or behaved like a clown
Answer:
The police did not investigate the murder case of ravin jayrathna