Answer
(C) - It is a conclusion made by Lucia.
Work Step by Step
Lucia wants to develop a process for dyeing shirts so that the color will not fade when the shirt is washed. She first forms the hypothesis that the dye needs something to help it combine with the fabric. Then, she conducts experiments in 1.10c and 1.10d to prove her hypothesis. After observing that the dye did not fade on the shirt soaked in vinegar, Lucia concludes that the vinegar binds with the dye so it does not fade when the shirt is washed.
