2. Which of the following is an example of voluntary trade?
A. A person is knocked down and rendered unconscious so a second person can take the
first person's money.
B. A person is kidnapped and returned to safety after the kidnappers have been paid
$1million.
C. A state legislature requires citizens to pay taxes to help cover the expenses of public
schools.
D. A music teacher is paid to give private lessons to a violin student
a