Based on this excerpt, what can be inferred about Oliver's neighbors is C. they think he is a bit peculiar, yet they revere him.
You can see this in the abstract because they say they find his behavior quite odd, and sometimes don't even understand him, or may be afraid of him, yet when he is in trouble, everybody takes care of him and everyone is actually there for him.
The Brobdingnagians govern themselves with a somewhat socialist system under which, for example, everyone brings what they grow to town and takes home only what they need
The answer would be Cosmo should stick to his original research question and ignore the new information, which will only distract him from his focus
<em>A/N: hope this helped you ;-;</em>