Which radical expression represents the difference between the expressions 5 square root 98 - 2 square root 162 and 2 square root 108 + 2 square root 48.
A 17square root2 + 20square root3
B 17square root2 - 20 square root3
C 20squareroot3 − 53square root2
D 20square root3− 17square root2