I believe the answer is sibilance correct me if i'm wrong.
To ensure all information is factual is the right answer.
The description of Britain's foreign policy during the Victorian era is D. Fear of competition leads to cautious isolationism.
There was no suggestion of 'British imperialism' as imperialism at that time has a strong connotation of dogma and politics as consideration for the acquisition of territory.
You provide supporting evidence in the body of your essay.
