Part I: Choose the best answer for each question:Câu hỏiWho is Eratosthenes? A. Eratosthenes of Cyrene was a brilliant Greek mathematician. B. Eratosthenes of Cyrene was a Greek poet. C. Eratosthenes of Cyrene was a Greek astronomer D. Eratosthenes of Cyrene was an Ancient Greek polymath: a mathematician, geographer, poet, astronomer, and music theorist.