功能法是第二语言教学法的主要流派之一。它是以______为纲，有针对性地培养学生的交际能力，实行交际化教学过程的一种教学法。

A. rivers, waterfalls and mountains
B. flying elephants and giant teacups
C. a huge castle
D. wild animals

A. The participants in the study.
B. The researchers of the study.
C. The errors made during the study.
D. The data collected from the study.