Based on the lines provided, the following lines suggest possible themes of the play:
A - This line indicates themes of safety, confinement, and restrictions. It suggests a physical or emotional constraint that may be central to the plot.
B - This line speaks to the theme of mental freedom versus physical confinement. It implies that while the characters may be physically trapped, their thoughts and beliefs remain their own.
C - This line introduces themes of fear, anxiety, and paranoia. It hints at external threats and the psychological toll that such a situation can take on individuals.
Overall, lines A, B, and C provide insights into themes of confinement, mental freedom, and fear, which could be significant elements in the play's narrative.