The following statements about Balzac and his works are correct:

A. Balzac was a great British Critical Realist writer in the 19th century. He was the founder and outstanding representative of European Critical Realist literature. He wrote 96 long, medium and short stories in his life, which were collectively known as "human comedy". B. Balzac created many capitalists with the characteristics of the times, such as the primitive and low-level usurer, Gobseck, who stored goods in The Usurant, and the old man Grandet who understood the function of money in The Bank of Newsingen. C. The short story Old Man Gao played a very important role in the "human comedy". Many important characters of "human comedy" appeared in it. From the perspective of the character system, Old Man Gao could be said to be the prologue of "human comedy". D. "Old Man Goriot" described the tragedy of the family becoming a place for people to cheat and plunder each other under the rule of the money principle. The daughter exhausted her father's property and then threw her father away like a squeezed lemon.