Read the following context and choose the best option to answer the question.
Context: 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 .
Question: Why was the narrator using vinegar ?
Options: 
A. To deal with the cooking .
B. To deal with color loss .
C. To make the food item more bitter .
D. None of the above choices .


B