The correct answer is D.
In "Beowulf," Grendel is always the villan of the story. He is presented as a man-eating demon, who daily slaughters Danes and feeds on his corpres. He is never anything more than an obstacle for Beowulf to overcome.
On the contraty, in "Grendel," the reader can see different aspects of him. He is presented as an inteligent creature, capable of rational thoughs and emotions.
The story shows Grendel's changes and growth. It explores his relationship with his mother, his fascination with humans -which eventually turns into hatred and disgust-, and provides his point of view about the battle with Beowulf.
It would be best if you made such an invitation personal; mentioning your school specifically. But I can help you with an example
Dear students and teachers!
Do you want to know how to best protect our environment? Do you need the motivation to remember to recycle?
Meet Al Gore, one of the leading voices in the fight against man-made global warming.
Al Gore will give you the motivation you need!
My general description of such a person is someone, anyone who encourages and inspires others to appreciate the positive qualities of life, such as, good hygiene, health, gentleness, contentment, and safety. These qualities may seem dull or cliche to many people, but anyone who practices these qualities and appreciates these qualities does find life much more rewarding as opposed to so many people who destroy their life with addictions, negative attitudes, slovenliness, criminal activity, despair etc.