Q4. When changing my engine oil at the track, what am I expected to do with the used oil?

a) Let it drip to the ground and be absorbed by the grass/gravel b) Let it drip to the ground and be absorbed by the grass/gravel, if it does not absorb it, pour some gas on it to facilitate absorption c) Use a drip pan to capture it, put it in a container and leave it in the garbage at the track d) Use a drip pan to capture it, put it in a container and bring it home for disposal at a proper waste recycling facility