Considering the differences between advertising and public relations $($PR$),$ which of the following should more appropriately be considered a PR campaign?

A multi$-$channel campaign that includes both direct email marketing and social media marketing to promote a new product.$$

A campaign that uses sponsored content in magazines to subtly influence public opinion about the environmental initiatives of a company.

A strategic effort to engage with media outlets for the purpose of publishing articles and news about a company's charitable activities.

All of these are good examples of PR campaigns.$$

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