The primary purpose for Al Gore's An Inconvenient Truth is
A) to inform the reader that there is an environmental hazard in burning fossil fuels
B) to entertain the readers with stories from his college days and his professor's quotations
C) to persuade the reader that by taking steps now they can help fight the damage done to earth's atmosphere
D) to express the author's personal opinion about his feelings toward the beauty of earth and his desire to share it with his children