Suppose You Were Handed Two Drinking Glasses, Each Containing a Clear

Suppose you were handed two drinking glasses, each containing a clear, colorless liquid. Four alternative hypotheses were postulated concerning the liquids contained in the glasses.
1) Both glasses contain water only.
2) One glass contains sugar dissolved in water, and the other glass contains water only.
3) One glass contains salt dissolved in water, and the other glass contains sugar dissolved in water.
4) Both glasses contain salt dissolved in water.
Which of the hypotheses could be rejected by tasting the liquid in one of the glasses and determining that it tasted sweet?

A) 3 and 4
B) 1 and 4
C) 2
D) 1 and 3