How does the CTA primarily fund its operations?

The correct answer reflects the primary sources of funding for the Chicago Transit Authority (CTA), which consist mainly of fares collected from riders, along with government subsidies and grants obtained from federal, state, and local agencies.

Fares provide a direct source of revenue as riders pay to access the transit system's services. Government subsidies and grants are critical for supporting operations and capital projects, allowing the CTA to maintain and expand its services, infrastructure, and fleet. These funds can come from various governmental levels aimed at enhancing public transportation and ensuring accessibility for all residents.

While advertising revenue and partnerships can contribute to the financial picture and provide additional support for specific initiatives or promotional campaigns, they do not constitute the primary means of funding. Tax revenues and sponsorships may also play a role, but the mainstay of the CTA's financial support comes from the combination of rider fares and government financial assistance, which forms the backbone of its operational budget.