The "Mozart problem", as defined by the author, is that ________

单选题The "Mozart problem", as defined by the author, is that _________.

推断题型
从第四段第一句可推出Mozart’S Problem应在之前提到：第三段第一句见注释

1The word "them" in the phrase "the complexity and effect of his use of them" in Paragraph 4 refers to _________.

2In the expression "a single bar of it" in the last paragraph, "it" refers to ________.

3in the last sentence, "K. 595" probably means a ________.