A. Tell the student not to ask such irrelevant
B. Tell the student that he would give the correct answer later
C. Give some vague answer and satisfy the student Questions
D. Ask the student-to find out the answer himself from books in the library

A. Jean Piaget
B. John Dewey
C. Martin Wagenschein
D. Lev Vygotsky

A. social, philosophical
B. social, social
C. philosophical, philosophical
D. environmental, psychological