It turned the water very deep indigo . When several more rinses failed to show a decrease in the amount of dye loss , I tried a vinegar rinse . That water came up clear , so assuming the problem was arrested , I got one more pan of cool water to rinse some of the vinegar smell from the shawl .
Why was the narrator using vinegar ?
Pick the best answer from the following options:
A. To deal with the cooking .
B. None of the above choices .
C. To deal with issues with color in clothing .
D. To make the food item more bitter .


C