Dual Flush water closets provide options selected by two buttons on the tank or a dual selection action of the handle.

• A. Two buttons on the tank
• B. One button
• C. Two handles
• D. Front lever

Answer: (A)

Dual flush toilets conserve water by offering two flush volumes. The control on the tank that enables this choice is typically two buttons, one for a smaller flush and one for a larger flush. That two-button design directly matches the idea of selecting between two flush options, making it the best fit. A single button would not provide a second option, two handles imply separate levers for each flush, and a front lever is a different control style not aligned with the described two-option tank control.