Multiply Using the Rule for Finding the Product of the Sum

Multiple Choice

Multiply using the rule for finding the product of the sum and difference of two terms.
- $$\left( x ^ { 2 } + 5 \right) \left( x ^ { 2 } - 5 \right)$$

A) $x ^ { 4 } - 25$
B) $x ^ { 4 } - 10$
C) $x ^ { 4 } + 10 x ^ { 2 } - 25$
D) $x ^ { 4 } - 10 x ^ { 2 } - 25$