If you want to check out free audiovisual materials, where would you go?

A-Video rental store
B-Art supply store
C-Teacher supply store
D-County instructional materials center

D-County instructional materials center

If you want to check out free audiovisual materials, you should go to option D - County instructional materials center. These centers often provide various resources for teachers and students to borrow, including audiovisual materials such as DVDs, CDs, and other educational media.