Question

The Earth’s population has increased by more than __________ people in the last 100 years. A. 300 million B. 7 billion C. 6.9 billion D. 5 billion

Answer 1

The answer is D

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Answer 2

the world's current population is 7.3 billion and the world population in 1915 was 1.8 billion. The increase over the past century is 7.3 billion - 1.8 billion = 5.5 billion. So, the correct answer would be "more than 5 billion" (option D).