Answer: The right answer is the B) “The witch was no longer a witch but only a broken old woman who had dared to create beauty in the midst of ugliness and sterility.”
Explanation: Just to elaborate a little bit on the answer, it can be added that options A and C should be easily discarded, since they are not supporting the theme. Those lines are talking about the passage of time (option C) and innocence (option A). Likewise, the passage in option D revolves around the character's acknowledgement of the emptiness of his life. Option B is, therefore, the one that supports the theme the best, since it is stating that despite being surrounded by ugliness and sterility, which certainly made her life very difficult to endure, the woman dared to create beauty, which surely gave her hope.