In "Shooting an Elephant" by George Orwell, "the real nature of imperialism" is shown when Orwell says that as a British officer in Burma, he himself is against colonialism because in a job like that you see the dirty work of the British Empire. And when he faces the elephant he sees clearly that even though he doesn't want to kill the elephant, he has to because the Burmese expect him to, so he is not free. By limiting the power of the others the British Empire has limited its own freedom making a place of hollow power.
It's C because D is explaining why injuries in sports are no different depending on your gender, its due to incorrect for or bad training.
Well, nothing can really happen in a black hole since nothing in the universe is faster than the speed of light. Anything that falls into a black hole can never escape. The border at which gravity becomes strong enough to create that phenomenon is called the "event horizon"; it marks the outer boundary of the black hole.
Hope I helped!
- Amber