Some oil sinks below the surface. Oil droplets form in the water. The oil and water mix together. The oil floats on top of the water.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: What happens when oil is placed in water?
Possibilities:
- Some oil sinks below the surface.
- Oil droplets form in the water.
- The oil and water mix together.
- The oil floats on top of the water.

The oil floats on top of the water.