A teacher creates a science unit for a second-grade class on properties of a parachute... How should the teacher help the students develop and test hypotheses about their parachutes?"
What approach should the teacher use to help second-grade students develop and test hypotheses about their parachutes?

a. Avoiding any hands-on activities
b. Encouraging students to make predictions only
c. Providing materials and allowing experimentation
d. Relying solely on theoretical discussions