During the Last Referendum on Quebec Sovereignty, the Federal Government

During the last referendum on Quebec sovereignty, the federal government spent millions of dollars on an advertising campaign to persuade Quebecers to vote in favour of unity. Which of the following statements most accurately describes the probable effect of this campaign?

A) Repetition of the unity message made it more believable to voters.
B) Using simple clichés in the unity message persuaded voters to support unity.
C) Whichever side spent more in a referendum on sovereignty got the most votes.
D) People were not easily persuaded by advertising on a major issue such as a referendum.