 The candidates that he mentions are a (1) life of pleasure, (2) a life of political activity , and (3) a philosophical life.
<fluency>  The candidates that he mentions are a (1) life of pleasure, (2) a life of political activity , and (3) a philosophical life.
 The candidates that he mentions are a (1) life of pleasure, (2) a life of political activity and (3) a philosophical life.