In the 1960s, many people under the age of 21 were in the U.S. Army fighting in a war in Vietnam. However, several states did no
t allow people to vote in elections until they reached age 21. How was this situation addressed? A) the Supreme Court ordered states to change their laws B) the President signed a law requiring that all 18 year olds vote C) an amendment to lower the voting age was added to the U.S. Constitution D) a new law was passed requiring members of the military be at least 21 years of age