Answer: C. experience of oppression
Explanation: The speaker in the excerpt expresses their longing for freedom and their suffering as a slave. They complain about being deprived of liberty and express their anguish and grief. This demonstrates the experience of oppression, as the speaker is trapped in bondage and yearns for relief from their painful situation. The excerpt highlights the injustice and lack of freedom faced by the speaker, emphasizing the theme of oppression.