Why is citric acid added to food?
to add color
to add tartness
to add bitterness
to add sweetness

C is wrong, the real answer is B: to add tartness, and the reason why is because citric acid comes from jam, jellies, and more! And that is why the answer B is the correct answer.

Hope this helped!

Nate

(P.S. if you buy jams and real the ingredients, it will say "citric acid." :))

where are the choice options?