An Insulator.
Insulators prevent flow of electric current. Example is wood, clay.
Is the something missing from the question
1. Rust, or Fe2O3, is a Chemical Compound.
2. Carbon is a Chemical Element found as C on the periodic table.
3. Apple Juice is a Heterogeneous Mixture, as it is uniform throughout. If it wasn't uniform, there would be yucky lumps in your apple juice :)
If I helped you out, I would greatly appreciate if you went through my other answers I gave you and gave them the brainliest answer :)
I think its A because some scientist from the Department of Physics of Northeastern University found out that is not a part of Dalton's atomic theory.
