Which One of the Following Scenarios Best Reflects the Basic

Which one of the following scenarios best reflects the basic idea of individual constructivism?

A) A student practices playing the F major scale on his violin until he can play it perfectly.
B) Four students in a study group divide the day's reading assignment into four sections.Each student reads a section and then teaches the material to the other group members.
C) A student tries to make sense of a poorly written and confusing magazine article.
D) Two students discuss possible interpretations of the proverb, "We only know the worth of water when the well is dry."