You will be given a definition of a task first, then some input of the task.
In this task, you're given an article, a question which often contains a blank and four options (associated with "A", "B", "C", "D"). Your task is to find the correct answer (from the given options) for the question from the given article and return one of the options from "A", "B", "C", and "D". Do not generate anything else apart from one of the following characters: "A", "B", "C", "D". There is only one correct answer for each question.

Article: Many university students dislike studying history because there is little to get excited about when historical events are presented in a boring manner. However, I'll never forget my American History professor, Dr. Williamson. Each event leaped from the pages of our text and became as real as the daily news report on the radio. My favorite lecture concerned the American Revolution. Dr. Williamson set the mood for the study by imitating Pall Revere, a well-known silversmith, working in his shop. The American colonists were angry because of the British control over their lives. Revere felt that war between the British and the colonists was inevitable. Then, Dr Williamson told us about Revere rowing across the Charles River from Boston on April 18,1775. I could see the professor row as he raised his hand to his forehead as if he were looking across the Charles River to the old North Church in Boston. Suddenly, Revere spotted two lanterns, a signal which meant that the British would attack by sea. He jumped on his horse to warn the villagers of the attack. Professor Williamson reminded us that the first battles of the American Revolution were fought at Concord and Lexington, Massachusetts, the year before the Declaration of Independence was signed in 1776. Never before had history seemed so alive to me. And all because a professor cared enough to put his heart into his teaching.
Question: The writer will never forget his American History professor because he _ .
Options: (A) would record all historical events onto the radio (B) would get very excited when giving lessons (C) would always teach the students the American Revolution (D) would make his class lively and interesting
Output:
D