Read the following context and choose the best option to answer the question.
Context: It 's well worth the effort however , as ' Pan Tadeusz ' is a richly rewarding read . The translation I read was by Kenneth R. Mackenie , which was the first to maintain the metre and rhyming couplets of the original throughout its 10,000 lines . Obviously there must have been some compromises made to achieve that , and there is the occasional rhyme that grated , but overall the poem reads as if it was written in English . Without wanting to give the ending away , it is the various characters love of their country and determination to liberate themselves from Russian rule that overrides all other thoughts .
Question: What was the main subject of the book ?
Options: 
- The maintenance of the metre and rhyming couplets for all 10,000 lines .
 - The reader Kenneth R. Mackenie , who wrote all 10,000 lines .
 - Pan Tadeusz was the main subject of the book .
 - Love of country and determination to be free of communist control .


Love of country and determination to be free of communist control .