Answer:
D (maybe)
Explanation:
without further context, it is hard to say
the universe is full of mystery and even that question itself stumbles some scientists, but we do have theories about why there are dark spots in our night sky
first (the reason i say D) is that the universe is IMENSLY large and we have yet to figure out where it ends -if it ends at all- so theres a possibility that there are objects and areas unseen to us as humans, maybe with different ways to receive light we can fill in the gaps
second is that the universe cannot be seen all in one time, and what i mean by that is the farther the origin of light, the older that light is compared to a closer object, so in all essence, we may be looking at the areas where space was like before the big bang, or where matter has yet to fill in those voids, because the light of present day edge-of-the-universe takes longer to get to our eyes, so for now we are looking at light that has had time to get to us
there are WAY WAY WAY (not spam because its true) more theories and ideas and even facts about this question, but to answer this would take extensive research, however if you have information before said test/quiz or just a question in general tied to this, i recommend looking over that and seeing for similarities that would help solve this
again this is a hard question to answer, but i hope i gave you the information you need, if you need clarification, lemmie know via comment
take care :)
