Class BB is a subclass of class AA. Method m expects a parameter of type BB. Which of the following method calls is syntactically incorrect?
a. m(new AA());

b. m(new BB());

answer:

the fed will purchase bonds from banks to inject money into the banking system. the banks can use these funds to provide loans to individuals and businesses.

explanation:

i'd try logging out, closing the browser, and unplugging the computer for a few seconds and then start everything back up again and log in. if it still doesn't work, maybe try clicking slower. or close a couple tabs or other windows you may have up

I don't know much ab computers but I hope this helped