Final answer:
Based on the text, the character Amy does not express a direct emotional reaction to the change in her skin color, but the tone suggests there may be a sense of disappointment associated with the changes and the events surrounding them.
Step-by-step explanation:
The student has asked about the speaker's reaction to the change in their skin color. Based on the provided excerpt discussing the character Amy's experiences, it appears that the correct answer is (a) Disappointment. Amy's dialogue, in which she asks whether she is going to be "colored now" and the way the tall white woman responds, along with Amy's recollection of the proud head she never saw again, suggests a sense of loss or change that wasn't entirely welcomed. However, it's important to note that the text is ambiguous since it does not directly describe Amy's personal reaction as a clear-cut emotional response like disappointment, excitement, indifference, or anger, but the overarching tone suggests a complex emotional reaction that could include elements of disappointment.