Guard against such statements as“if A, then B, and if B, then C,” and so forth, in case it falls into the category of "slippery slope" as a kind of logical fallacy.

A．错误
B．正确

A. 古代阴历中闰月设置的规律与作用
B. 中国古代历法在当时有先进水平
C. 阴阳历调和问题在古代是个世界性问题
D. 中国古代如何解决阴阳历差异问题