单项选择题
Washington Irving was the American first man of letters to be known internationally. His works were received enthusiastically both in England and in the United States. He was, in fact, one of the most successful writers of his time in either country, delighting a large general public and at the same time winning the admiration of fellow writers like Scott in Britain and Poe and Tarwthorne in the United States. The respect in which he was held was partly owing to the man himself, with his warm friendliness, his good sense, his politeness, his gay spirits, his artistic integrity, his love of both the old World and the New. Thackeray described Irving as a "gentleman, who, though himself born in no very high sphere, was most finished, polished, witty; socially the equal of the most refined Europeans". In England he was granted an honorary degree from Oxford -- an unusual honor for a citizen of a young, uncultured nation -- and received the medal of the Royal Society of Literature; America made him ambassador to Spain. Irving’s background provides little to explain his literary achievements. A gifted but delicate child, he had little schooling. He studied law, but without zeal, and never did practice seriously. He was immune to his strict Presbyterian home environment, frequenting both social gatherings and the theater.
Why is the honorary degree from Oxford which Irving was granted so unusual（） A．Because Oxford was a famous university iii the world.
B．Because he was from America which was a country with young history and less culture.
C．Because the degree was not easy to get.
D．Because he was not so famous as his fellow writers.