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15 December, 16:34

You have two boxes of colored pens. The first box contains a red pen, a blue pen, and green pen. The second box contains a yellow pen, a red pen, and a black pen. What is the set that represents all the pens?

A. {red pen, blue pen, green pen}

B. {red pen}

C. {red pen, red pen, green pen, yellow pen, black pen}

D. {red pen, blue pen, green pen, yellow pen, black pen}

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  1. 15 December, 17:57
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    D. Although C might be correct, D lists the blue pen that is in the first box and C doesn't.
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