When a battery needs fluid, what fluid should be added?

When a battery needs fluid, what fluid should be added?
A)Water and antifreeze.
B)Water and oil.
C)Distilled water.Correct
The battery provides electrical energy for the vehicle's demands, drawing on chemical energy produced by the reaction of an electrolyte (a solution of distilled water and sulphuric acid), mainly when the engine is off.
Over time, the distilled water contained in the battery cells undergoes an evaporation process. When the level is low, distilled water should be added without exceeding the normal level and avoiding splashing.