Smitha bought 80 litres of drinking water for a party. The total cost of drinking water was Rs. 240. Which of the following number sentences could be used to determine the cost of one litre drinking water?

• A. Rs.240 + 80 = [    ]
• B. Rs.240 - 80 = [    ]
• C. Rs.240\[\div \]80 = [    ]  
• D. Rs.240 x 80 = [    ]