Answer:
The president uses the media to influence public opinion on policy through speeches or opinions issued through mass communication channels, such as television, social networks, radio or newspapers. In this way, they express their different opinions seeking to attract support from the citizenry, which will ultimately endorse or not the measures that the president is going to take.
As much as I have read about this topic, I owuld say the answer is A
Strong navies were incredibly important to European mercantilism because they were needed to protect the merchant ships from pirates, who were common and would raid the ships for profit.