What is imperialism?

question 6 options:

the building of secret alliances among powerful nations

the economic and political domination of a strong nation over weaker ones

the internal expansion of territories within one's own borders

the political desire to bring economic prosperity to one's country

What is the problem with the following sentence: cameron, who has an extreme and unreasonable suspicion of other people and their motives, suffers from paranoia which is a psychological disorder characterized by delusions of persecution or grandeur, was absolutely sure that someone was following him even though he was absolutely alone and hadn't seen a car for miles and miles.