Answer:
The correct answer is D. It is cast in private and is free from outside influence.
Step-by-step explanation:
The secret ballot or Australian ballot is considered a method in which voters could anonymously make their choices in an election. The system was created with the idea of having political privacy.
Some voting systems use secret ballots but the most common secret ballots' use consists of the utilization of blank sheets in which voters make their choices. They do not reveal the votes and they put the paper in a sealed box. An important aspect related to the secret voting is the use of voting booths which allowed the voter to have privacy when they were writing on the ballot paper.