What is the merit and demerit of social media ?

Social media can be a useful tool for businesses, bringing advantages such as engaging with your audience and boosting website traffic. However there can also be disadvantages, including the resources required and negative feedback.

explanation: the line "to save the day, harry must get past a scary three-headed guard dog" from the summary best justifies the conclusion that harry potter and the sorcerer’s stone was influenced by ancient greek mythological literature. the three other choices had nothing to do with ancient greek literature - and the words "three-headed guard dog" are what makes that choice the correct answer.