Presidential elections in Iran: what's at stake?

On May 19, 2017, Iranians will choose their new President from the 6 candidates in the running. Reformers versus conservatives, moderates versus hard-liners, the fault lines are not new, but they are part of a different geopolitical context. Between the candidates who thus reject the fusion of politics and religion, those who propose a new path, or even a way out of the Islamic Revolution, and those who intend to lock down the system, what will be the choice of the Iranian people?