Beakers W,X,Y,and Z Contain Either Aqueous NaCl,k₂SO₄,NH₄NO₃,or H₂O

Multiple Choice

Beakers W,X,Y,and Z contain either aqueous NaCl,k₂SO₄,NH₄NO₃,or H₂O.Which beaker contains only distilled water if the light bulb glows brightly when testing the conductivity of beakers W,X,and Y?

A) beaker W
B) beaker X
C) beaker Y
D) beaker Z
E) all of the above