Which event is an example of the principle of checks and balances?
On December 8, 1941, the US Congress declared war on Japan in response to the attack on Pearl Harbor.
On March 3, 1931, the US Congress made “The Star-Spangled Banner” the national anthem.
On November 2, 1983, President Ronald Reagan signed a law that made Martin Luther King Jr.’s birthday a national holiday.
On June 26, 2013, the US Supreme Court ruled that the 1996 federal Defense of Marriage Act was unconstitutional.