Simplify completely and find the restrictions on the variables. here are the answer choices~ a. quantity x minus 5 over quantity x plus 1, x ≠ −1, x ≠ −9 b. quantity x minus 5 over quantity x plus 1, x ≠ −1, x ≠ 5 c. quantity x plus 5 over quantity x plus 1, x ≠ −1, x ≠ −9 d. quantity x plus 5 over x plus 1, x ≠ −1, x ≠ 5