A Science Teacher Engages the Students in an Exploration of Chemical

A science teacher engages the students in an exploration of chemical reactions by having the students drop small amounts of vinegar on various substances and having them record what happens using a prepared form with the names of each substance tested listed in one of the two columns. The teacher is employing what primary teaching methodology?

A) Expository
B) Guided inquiry
C) Discovery
D) Free discovery
E) All of the above
F) None of the above