Given the Set Sketched on the Number Line, Identify the Type

Multiple Choice

Given the set sketched on the number line, identify the type of interval (open, closed, half-open, open infinite, closed infinite) , write the set using set-builder notation, and write the set using interval notation.
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A) closed infinite interval; $\{ x \mid x \geq - 9 \} ; [ - 9 , \infty )$
B) open infinite interval; $\{ x \mid x < - 9 \} ; ( - \infty , - 9 )$
C) open infinite interval; $\{ x \mid x > - 9 \} ; ( - 9 , \infty )$
D) closed infinite interval; $\{ \mathrm { x } \mid \mathrm { x } \leq - 9 \} ; ( - \infty , - 9 ]$