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Geometry Difficulty 3.0 AMC 10/12 Find the answer United Kingdom

$P$ , $Q$ and $R$ are the three angles of a triangle, when each has been rounded to the nearest degree. Which of the following is the complete list of possible values of $P+Q+R$ ?

(A) $179°, 180°$ or $181°$ (B) $180°, 181°$ or $182°$ (C) $178°, 179°$ or $180°$ (D) $180°$ (E) $178°, 179°, 180°, 181°$ or $182°$

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