Considere as possibilidades de reescrita do segmento method...

Considere as possibilidades de reescrita do segmento methodically learning it is key to her rise (l. 44).

I - it is key to her rise methodically learning

II - to learn methodically is key to her rise

III- learning it methodically is key to her rise

Quais poderiam substituir o segmento destacado, sem prejuízo do sentido original e da correção gramatical?