The correct boolean expression which correctly represents the conditions and evaluates to true ls the option B.
Using the following boolean evaluation rule :
((age ≥ 13) OR (grade ≥ 9)) AND (age ≤ 18)
(T or T) and F ( less than 18)
T and F = False
((age ≥ 13) OR (grade ≥ 9)) AND (age < 18)
(T or T) and T
T and T = True
Therefore, the correct option is B.
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