Which of the following is considered a form of external marketing?

External marketing encompasses various strategies and methods aimed at reaching potential customers outside of a business's immediate environment. Both social media posts and print advertisements are key examples of this type of marketing, as they are designed to promote the brand and attract new clientele to the business.

Social media posts allow brands to engage with their audience on platforms like Facebook, Instagram, and Twitter, creating awareness and fostering communication. Print advertisements serve to reach audiences through physical media, such as flyers, brochures, and newspapers, effectively generating visibility within the community.

Email newsletters, while valuable for client retention and engagement, primarily target existing customers rather than reaching out to new prospects. Therefore, when considering the broader scope of external marketing, all mentioned options—social media posts, print advertisements, and email newsletters—contribute to raising awareness and attracting new clientele, confirming that the comprehensive nature of "all of the above" captures the essence of external marketing strategies effectively.