Multi-choice problem: Choose from the options at the end, and answer how do you do this: Make ice coffee without watering it down

Select from: (a). Fill an ice tray with hot water, let it set for while, then freeze the ice cubes. Add water ice cubes to hot coffee to cool the coffee down.; (b). Fill an ice tray with hot coffee, let it set for while, then freeze the coffee cubes. Add coffee ice cubes to hot coffee to cool the coffee down.;
(b).