Mary needs 2 kilograms of potatoes. Which number sentence could be used to figure out how many grams of potatoes Mary needs? (1,000 grams = 1 kilogram) A. 1,000 ÷ 2 = □ B. 2 × 1,000 = □ C. 2 × 100 = □ D. 100 ÷ 2 = □