You Shake Up a Bottle of Vinegar and Oil Dressing

You shake up a bottle of vinegar and oil dressing to mix it each time you use it.The reason you need to do this is that:

A) oil is hydrophobic and won't dissolve in vinegar, so the oil and vinegar separate upon standing.
B) vinegar and oil are oppositely charged, and opposites attract.
C) fat molecules are too large to dissolve in water.
D) vinegar has an acidic pH and is neutralized when mixed with oil.