The best source to analyze the Persian perspective of the Mongol Empire during Mongol rule would be:
c. the Jami al-tawarikh
The Jami al-tawarikh, or "Universal History," was a major historical work written by the Persian historian Ata-Malik Juvayni in the 13th century. It provides a detailed account of the Mongol conquests and includes perspectives from the Persian point of view, making it an invaluable source for understanding how the Mongols were viewed in Persia and the impact they had on the region.