Solve the Polynomial Inequality $$u ^ { 2 } - 12 u \leq - 32$$

Multiple Choice

Solve the polynomial inequality. Write the answer in interval notation. $$u ^ { 2 } - 12 u \leq - 32$$

A) $[ 4,8 ]$
B) $( - \infty , 4 ) \cap [ 8 , \infty )$
C) $( - \infty , 4 ] \cap [ 8 , \infty )$
D) { ]