This is the best slogan for a public service announcement for several reasons. This ad has a message that is positive enough for the government to want to encourage it. Moreover, the message addresses a concern of public nature (the health of citizens). Finally, the fact that the message is catchy and the phrase is playful increases the chances of people paying attention to it.
The correct answer might be B because this slogan might catch people's attention and they might exercise to get their heart healthy so as to prevent heart disease.
