The setting of "Marigolds" is during the depression or the 30s. You know this because the story says, "The depression that gripped the nation was no new thing to us" and "the black workers of rural Maryland had always been depressed".
I would say that the parallel list here is C) a lost puppy, a colored poster, and a happy boy.
This is because all words have an article <em>a, </em>and an adjective in front of them, so they are parallel.
Pattern A (add 5)
First term is 1 so, add 5 to 1, for the 2nd term, keeping adding 5 to the values you find from previous
1 + 5 = 6
6 + 5 = 11
11 + 5 = 16
16 + 5 = 21
1, 6, 11, 16, 21
Pattern B ( minus 4)
First term is 28, so minus 4 to get a value, now take 4 from the value & so on...
28 - 4 = 24
24 - 4 = 20
20 - 4 = 16
16 - 4 = 12
28, 24, 20, 16, 12
Hope this helps!
Yield signs are red, white, and triangular. An upside down triangle that is.