Add or Subtract $7 \sqrt{98}-7 \sqrt{200}$ A) $21 \sqrt{2}$ B) $-21 \sqrt{2}$ C) $119 \sqrt{2}$

Multiple Choice

Add or subtract. Simplify by collecting like radical terms, if possible.
- $7 \sqrt{98}-7 \sqrt{200}$

A) $21 \sqrt{2}$
B) $-21 \sqrt{2}$
C) $119 \sqrt{2}$
D) $-119 \sqrt{2}$