Scientist drop sugar into a water solution. Overtime the sugar diffuse in the evenly in the water solution. Why did this happen and what type of transport is this?

A. This happens because when sugar molecules are in low concentration they move into a high concentration. This is an example of active transport.

B. This happens because when sugar molecules are in low concentration they move into a high concentration. This is an example of passive transport.

C. This happens because when sugar molecules are in a high concentration they move into a low concentration. This is an example of active transport.

D. This happens because when sugar molecules are in a high concentration they move into a low concentration. This is an example of passive transport.