The contrast help you understand " how strong a black hole is". Hence here correct option is A.
What do you mean by Black hole?
It is region of space time with very strong gravitational pull that even smallest particle or electromagnetic wave is incapable to escape it.
A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it.
The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.
Therefore, correct option is A.
Learn more about Black hole, refer to the link:
https://brainly.com/question/10597324
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