You have two boxes of colored pens. The first box contains a red pen, a blue pen, and a 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? (1 point) Responses {red pen, blue pen, green pen} {red pen, blue pen, green pen} {red pen} {red pen} {red pen, red pen, green pen, yellow pen, black pen} {red pen, red pen, green pen, yellow pen, black pen} {red pen, blue pen, green pen, yellow pen, black pen}
