Find All Values That Make the Rational Expression Undefined

Multiple Choice

Find all values that make the rational expression undefined. If the rational expression is defined for all real numbers, so
state.
-x² - 16 x² - 11x + 28

A) x = 0
B) x = -7, x = -4
C) x = 4, x = -4
D) x = 7, x = 4