Citric Acid,a Natural Food Preservative,accounts for the Tartness of Citrus

Citric acid,a natural food preservative,accounts for the tartness of citrus fruits.It is shown below.About 730 g of this material can be dissolved in water,making a liter of solution.However,only about 1.5% of it dissociates.As such,it would be considered a _____.

A) nonelectrolyte
B) strong electrolyte
C) pseudoelectrolyte
D) weak electrolyte