Final answer:
Mandarin Chinese is spoken by approximately one billion people, whereas Hindi has fewer speakers. The correct answer is that about 500 million more people speak Mandarin than speak Hindi.
Step-by-step explanation:
We need to compare the number of Mandarin speakers with the number of Hindi speakers to answer the question. It is widely known that approximately one billion people speak Mandarin Chinese, making it the most spoken language in terms of number of native speakers. On the other hand, Hindi is also a major language but has fewer speakers in comparison.
Considering the population of India and the fact that Hindi is spoken by a significant portion but not all, we can estimate that Mandarin is spoken by about 500 million more people than Hindi, globally. So, the correct answer to the question: 'About how many more people speak Mandarin than speak Hindi?' is option (c) about 500 million more people speak Mandarin than speak Hindi.