Which is a property of all acids?A. They contain OH- ions.B. They contain H3O+ ions.C. They increase the OH- concentration in solution.D. They increase the H+ concentration in solution.

D. They increase the H+ concentration in solution.
Acid is a subatance that is capable of donating a proton or forming covalent bond with an electron pair.
All acids dissociates in solution to produce hydrogen ion concentration. Hence we can conclude that a property of all acids is that they increase the H+concentration in solution.