(20 Points)
Which conjunction or disjunction is equivalent to following open sentence?
[tex]|\alpha - 9|\leq 4[/tex]

A. [tex]\alpha - 9 \geq 4[/tex] and [tex]\alpha - 9 \leq 4[/tex]

B. [tex]\alpha - 9 \leq 4[/tex] or [tex]\alpha - 9 \geq -4[/tex]

C. [tex]\alpha - 9 \leq 4[/tex] and [tex]\alpha - 9 \leq -4[/tex]

D. [tex]\alpha - 9 \leq 4[/tex] and [tex]\alpha - 9 \geq -4[/tex]