Final answer:
The world population is expected to reach 9 billion by 2050 and 11.2 billion by 2100.
Explanation:
The correct answer is C. 9 billion. According to United Nations projections, the world population is expected to reach 9.7 billion by 2050 and 11.2 billion by 2100.
Learn more about world population growth here:
https://brainly.com/question/39730216
