Add a comma where needed, if needed in the sentance in quotes. "the grammar notes on the board will be on the test."

Which line from president reagan’s address sat moscow state university is a fact? a. democracy is the standard by which governments are measured. b. throughout the world, free markets are the model for growth. c. the key is freedom-freedom of thought, freedom of information, freedom of communication. d. every four years the american people choose a new president, and 1988 is one of those years.