GCSE Maths Practice: best-value

\( \begin{array}{l} \textbf{Three options for bottled water:} \\ \text{A: 500ml for £0.50} \\ \text{B: 1L for £1.00} \\ \text{C: 2L for £1.60} \\ \\ \textbf{Which is the best value for money? Type the option (e.g., A, B, or C).} \end{array} \)