The correct answer is "their".
Irony is when the opposite of the expected outcome occurs. The answer would be C. The desire to make people safe leads to a future in which everyone is confined to their beds.
The idea would be that everyone would be save to live how they please, but being confined to their beds does not allow them any opportunity for life.
Hope this helps!!
Odysseus in "The Odyssey" by Homer is a dynamic character.