One of the primary components of a fair and free election is the use of secret ballots. what is a secret ballot?
a.
a ballot where any citizens vote can be seen but only for a limited time

b.
a ballot that remains secret to everyone except the voter and his/her family

c.
a ballot where invisible ink is used and then read by screeners at a later time

d.
a ballot for citizens to vote on without their vote being known by anyone else