The diagram shows a plant in a cup on a Sunday and again next Tuesday. In the beginning, the cup was filled to the top with water. By Tuesday, the level of the water has decreased. What is the reason? (2015)

• A.  Water in the cup has frozen.
• B.  Water in the cup has condensed.
• C.  Water has been absorbed by the roots.
• D.  Water has disappeared from the cup.