The main purpose of the Federal Reserve Act of 1913 was to establish an alternative to commercial banks. Regulate banks' mortgage-lending policies. Established a new system for creating currency. Oversee and regulate commercial banks.

A. establish an alternative to commercial banks.

Explanation:

The main purpose of the Federal Reserve Act of 1913 was to establish an alternative to commercial banks regulate banks mortgage lending policies establish a distribution system for currency oversee and regulate commercial banks