After Explaining What Sines and Cosines Are, a High School

Multiple Choice

After explaining what sines and cosines are, a high school math teacher shows students how they might use these concepts in constructing a large building. Which one of the following principles does this scenario best illustrate?

A) Over time, self-talk gradually evolves into inner speech.
B) Thought and language become increasingly interdependent with age.
C) Acquiring the cognitive tools of one's culture enables youngsters to live and work more effectively.
D) Children function more effectively when they work at their actual rather than potential) developmental levels.