Which of the Following Is an Example of Marketing Through

Which of the following is an example of marketing through social media?

A) a leading brand of sports shoes sponsors the soccer world cup
B) a software company organizes a cancer awareness camp free for all
C) a new department store in your neighborhood that relies on people to spread the word
D) a newspaper article talks about the pollution control processes put in place by a steel manufacturing giant
E) a leading car manufacturer advertises the new model on facebook