B. impertinent
The prefix "im-" means "not" in Latin. An example of this would be the word imperfect. Adding the prefix "im-" to the word perfect literally makes it "not perfect".
the answer is d. because the others use the short hand of is. example: it is mine. instead they put it's mine
two noble households in the city of Verona. ancient grudge
Here, you would need to add the preposition "in."
The sentence should read: My elder sister is really interested in the problems of the environment.
Other prepositions would not make sense and could confuse the reader as to the intended meaning.