Final answer:
The maturation of the systems that are sensitive to reward lags behind the maturation of systems responsible for self-control during adolescence. The correct answer is option a.
Step-by-step explanation:
The correct answer is a. systems that are sensitive to reward; systems responsible for self-control.
During adolescence, the maturation of the systems that are sensitive to reward lags behind the maturation of the systems responsible for self-control. This means that teenagers often have a heightened sensitivity to rewards and are more prone to seeking immediate gratification, while their ability to regulate their impulses and make decisions based on long-term consequences is still developing.
For example, a teenager may be more likely to engage in risky behaviors like experimenting with drugs or engaging in reckless driving, as the reward-seeking part of their brain is more active, but the self-control part of their brain is not fully mature yet.