At which stage does a student's ability to systematically consider multiple possibilities and solve complex problems typically occur?

At which stage does a student's ability to systematically consider multiple possibilities and solve complex problems typically occur?

کسی طالب علم کی متعدد امکانات پر باقاعدگی سے غور کرنے اور عام طور پر پیچیدہ مسائل کو حل کرنے کی صلاحیت کس مرحلے پر ہوتی ہے؟
Explanation

In the Formal Operational Stage, students develop the ability to think abstractly, consider multiple possibilities, and solve complex problems systematically.

This stage typically begins around age 12 and continues into adulthood.