Rosemary walks each week for exercise. Let d represent the distance walked and h represent the number of hours spent walking. Last week: walked 18 miles in 6 hours This weel: 2.5 hrs Which statement must be true A.) Last week, Rosemary walked at a faster pace B.) This week Rosemary walked a greater distance C.) Last Rosemary walked a greater distance D.) This week Rosemary walked at a faster pace