. A student adds 2 mL of acetic acid to a test tube containing 2 mL of distilled water. He then shakes the

 test  tube  well  and  leaves  it  to  settle  for  some  timeAfter  about  5 minutes he observes  that  in the test  tube  there  is:    

(A)  A clear transparent colorless solution

(B) A clear transparent pink solution

(C) A precipitate settling  at the bottom of the test tube

(D) A layer of water over the layer of acetic acid