Which number sentence below matches this word problem? Grandma's house is 7 miles away. Aunt Millie's house is only 5 miles away. How much farther is Grandma's house than Aunt Millie's? A. 5 + 7 = 12 B. 7 × 5 = 35 C. 7 - 2 = 5 D. 7 - 5 = 2