Read the following excerpt from a speech. What is the purpose of this speech?

My friend was lying face down on playground equipment when he had me take a picture of him. Sounds like a boring picture, right? This describes the phenomenon known as planking. Planking is done by keeping your body flat, face down, on a flat surface while some parts of your body are suspended. The term was created in South Australia and made popular in the United Kingdom. It sounds like just a silly fad that will add useless pictures to social media sites, but it can be dangerous. Several people have actually died planking at great heights. On top of this, there have been arrests and other problems caused by young teens trying to top each other for the best planking pictures. It’s okay for teens to participate in planking and other popular trends, but they need to remember the importance of using common sense and their best judgment.

Common sense is defined as using one’s best judgment after knowing some facts about the situation. When you’re in the moment and struggling to handle peer pressure, it can be difficult to determine what is right and what is wrong. We need to remember the importance of taking a moment to restrain ourselves and weigh the consequences of our actions before trying something just because it looks fun or will make for a great story or picture for social media.

a.to teach students about the history of fads in the United States
d.to persuade students to start an anti-planking campaign
c.to tell students a story about people who live dangerously
d.to teach students about the negative effects of peer pressure
e.to inform students about the importance of using common sense