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B. 29.3 inches
Arc length = (angle in degrees/360) x 2π x radius
Arc length = (120°/360) x 2π x 14 inches
Arc length = (1/3) x 2π x 14 inches
Arc length = (2/3) x 14π
Arc length = 28/3 x 3.14159
Arc length = 29.3 inches