Answer:
The correct answer is option A. "2045".
Step-by-step explanation:
Many environmental scientist have the projection that the Earth has a maximum carrying capacity of 9 billion to 10 billion people, which would mean that at the point the resources of the Earth would start to decline. By 2045 it is projected that global population will reach nine billion people, therefore, it is believed that by that year the human population would reach its carrying capacity.