Here is your answer!
Your answer is A: 316 million people
Both answers C and D seem extreme, because as of 2024, there is about 8 billion people. There is no way it can be C or D.
B seems extreme as well, because that’s only 316,000, which seems very small compared to our 8 billion currently.
So that’s just leaves us with our answer of A! I hope this helps!