What will be the result if the expressions 2x – 4x2y and 16y2x + 2x2y are added?

• A. 2x – 4x2y + 18x2y
• B. 2x – 2x2y + 16y2x
• C. 2x – 2x2y – 16y2x
• D. 2x + 4x2y + 18x2y