Pepsi

Vinegar

Orange Juice

A) They are all acidic.

B) They all taste bitter.

C) They all have a pH above 7.

D) They all turn litmus paper blue.

Let's eliminate the options one at a time.

A) They indeed all can donate an extra proton (or H+) so they are acidic. A is true.

B) They will not taste bitter, as acids, like those listed, will be sour. B is false

C) A pH above 7 means that something is basic, not acidic. C is false

D) Litmus paper turns blue when exposed to something basic, and red when exposed to something acidic. D is false.

The correct answer is A