R(x) = \frac{8(x^2 - 3x - 70)}{9(x^2 - 100)}\newline Select the correct choice below and fill in any answer boxes within your choice.\newline A. The domain of R(x) is \{x | \boxed{ }\}.\newline (Type an inequality in the form x \ne . Use integers or fractions for any numbers in the expression. Use commas to separate answers as needed.)\newline B. The domain of R(x) is the set of all real numbers.