Which age is cited as when the brain's development affecting reasoning is not complete?

Which age is cited as when the brain's development affecting reasoning is not complete?

• A. 18
• B. 21
• C. 25
• D. 30

Answer: (C)

Reasoning relies on the prefrontal cortex, the brain area responsible for planning, impulse control, and complex decision-making. This region matures later than many other brain areas, with development continuing into the mid-20s. Around 25 is a commonly cited point where this maturation is still incomplete, which is why that age best fits the idea that reasoning-related brain development isn’t finished yet. Earlier ages (like 18 or 21) are still within the period of ongoing maturation, and by 30 most people have completed this development, so 25 is the best marker for when it’s not fully complete.

Reasoning relies on the prefrontal cortex, the brain area responsible for planning, impulse control, and complex decision-making. This region matures later than many other brain areas, with development continuing into the mid-20s. Around 25 is a commonly cited point where this maturation is still incomplete, which is why that age best fits the idea that reasoning-related brain development isn’t finished yet. Earlier ages (like 18 or 21) are still within the period of ongoing maturation, and by 30 most people have completed this development, so 25 is the best marker for when it’s not fully complete.