Read the following context and choose the best option to answer the question.
Context: In the surfeit of power I was a murderer and an oppressor . In my most evil moments I was convinced that I was doing good , and I was well supplied with systematic arguments . It was only when I lay there on rotting prison straw that I sensed within myself the first stirrings of good . Gradually it was disclosed to me that the line separating good and evil passes not through states , nor between classes , nor between political parties either - but right through every human heart - and through all human hearts ... .
Question: Why did being imprisoned prompt the speaker to reflect on and realize the true nature of morality ?
Options: 
- They had a cellmate who encouraged them to take a good hard look at their past conduct
 - The prison offered a spirituality course that allowed them to think about the philosophy of the matter
 - They spent much time praying to god and had a vision outlining what they had done wrong
 - The humbling experience of losing all freedom was an eye opening paradigm shift for the speaker


The humbling experience of losing all freedom was an eye opening paradigm shift for the speaker