What is the name of the economic doctrine that treats individual six-year presidential terms as the primary unit of political-economic analysis, a framework used by scholars to periodise modern development?

• A Cardenismo
• B Desarrollismo
• C Sexenio theory ✓
• D Porfirismo

The sexenio — the fixed six-year presidential term with no re-election — is so central to governance that analysts treat each one as a distinct political era.