Which of the following lowered the voting age from 21 to 18?A) Thirteenth Amendment // B) Twenty-sixth Amendment // C) Twenty-eighth...

All you have to do to get this answer is to look in the
Constitution in the back of your history book.  All the amendments are listed and they
are not really all that long.  If you look there, you will see that the 26th Amendment
was the one that gave people 18 and over the right to
vote.

This amendment was ratified in 1971.  It is generally
believed that the amendment was able to pass because of the Vietnam War.  Most people
would say that public opinion came to favor allowing 18 year olds to vote because they
were being drafted and sent to fight in Vietnam.  If they were old enough to fight for
their country, the logic went, they were certainly old enough to be allowed to
vote.

For this reason, 18 year olds were given the right to
vote.  The correct answer is B.