Read this excerpt from A Black Hole is NOT a Hole.
As you take off, remember: predicting the exact details of your journey is tricky. After all, no one has ever visited a black hole, and we can’t send a probe in to take a peek and send the information back to us. Not even sneak previews can escape from a black hole.
What is the author doing by using the phrase "Not even sneak previews can escape from a black hole"?
A defining space travel
B describing the history of astronomy
C defining a black hole
D describing the purpose of a probe
Explanation: A black hole is a region of spacetime where gravity is so strong that nothing particles and even electromagnetic radiation such as light can escape from it.
