Which conjunction or disjunction is equivalent to the open sentence |a - 9| ≤ 4.

A.

a - 9 ≥ 4 and a - 9 ≤ - 4

B.

a - 9 ≤ 4 or a - 9 ≥ - 4

C.

a - 9 ≤ 4 and a - 9 ≤ - 4

D.

a - 9 ≤ 4 and a - 9 ≥ - 4

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