When a positive integer x is divided by 5, the remainder is 4. When po

When a positive integer x is divided by 5, the remainder is 4. When positive integer y is divided by 4, the remainder is 3. Which of the following values CANNOT be the sum of x and y? (A) 12 (B) 15 (C) 18 (D) 21 (E) 24

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