Let $X = \{ x \mid x < - 1 \}$

Multiple Choice

Let $X = \{ x \mid x < - 1 \}$ and $Y = \{ x \mid x \geq - 6 \}$ . Determine the given union. Express the answer in interval nota $X \cup Y$

A) $[ - 6 , - 1 )$
B) $( - \infty , \infty )$
C) $( - \infty , - 6 ]$
D) { } .