13. Ryan has 1,000 + 400 + 30 + 9 marbles. Gracle has 1,000+ 900 + 30+ 9 marbles. Which comparison of the marbles is correct? A 1,939 = 1,939 B. 1,439 > 1,939 C. 1,439 < 1,939 D. 1,939 > 1,939