Faith's pink ribbons are example of a C. SYMBOL.
In Young Goodman Brown, Faith's pink ribbons initially symbolizes Faith's innocence.
However, as the poem progresses, the pink ribbons took up the symbol of deceit when it was found in the forest.
So, from symbolizing innocence, the Faith's pink ribbons became a symbol of deceit hidden behind an innocent facade.
B. Shutter because it allows light to pass for an determined period