If \(r\) is represented by the decimal \(0.t5,\) what is the digit \(t?\)

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If \(r\) is represented by the decimal \(0.t5,\) what is the digit \(t?\)

(1) \(r < \dfrac13\)
(2) \(r < \dfrac1{10}\)

Answer: B

Source: GMAT Paper Tests