Either
The overpopulation problem is so dire that selecting some humans to be a food source is a just solution.
Or
There are no reasonable objections to the author's proposal.
The text that supports the idea that Kovaloff is intimidated by his nose is: "you should know where you belong". The correct answer would be option A. Being intimidated is being frightened or not confident on a certain situation. In this case, this statement indicates that Kovaloff is indeed intimidated by his nose.
Coordinating conjunctions connect phrases or clauses.
