Explanation

A is correct because Bernard Arnault surpassed Elon Musk to become the world's richest person on that date. B is incorrect because Jeff Bezos did not take the title from Elon Musk on this specific date. C is incorrect because Bill Gates was not reported as taking the title at that time. D is incorrect because Mark Zuckerberg did not take the title from Elon Musk on this specific date.