Answer:
The technological singularity—also, simply, the singularity—is a hypothetical future point in time at which technological growth becomes uncontrollable and irreversible, resulting in unforeseeable changes to human civilization.
Explanation:
According to the passage, a singularity is a single point of densely packed matter that sits at the center of a black hole. In other words, there's a lot of matter packed really tightly together, making it really heavy. This heavy bunch of matter is squished into the tiny space at the middle of a black hole.
It’s a because that’s the middle
Options C and D feature parallel structure.
Parallel structure occurs when the same grammatical pattern is used. In options C and D, the same grammatical pattern is used in each: both are questions, and both begin with a verb followed by the subject.