What is the regular full fare for adults aged 12-20 using cash?

The regular full fare for adults aged 12-20 using cash is set at $2.50. This fare structure is part of the Chicago Transit Authority's pricing system, which designates different fares based on age and payment method. The fare for adults in this age range reflects the standard pricing for bus rides, allowing young adults to access public transit services effectively. Understanding the fare structure is crucial for properly budgeting for travel costs on the CTA system. Other options, while close, do not align with the current fare standards, emphasizing the importance of familiarity with the exact figures provided by the CTA.