Transfer of thermal energy — practice question

The handle on a metal saucepan is made from plastic. When the saucepan is heated, the handle becomes warmer. Which statement best explains this?

• AMolecules of the plastic radiate their energy to other molecules.
• BMolecules of the plastic vibrate more and pass on their energy to nearby molecules.
• CThe free electrons in the plastic transfer the thermal energy along the handle.
• DThe heated molecules very slowly move along the plastic handle.