For a maximum work to be done, which of the following combination of force and distance will be required?

Question

$\begin{array}{1 1} (a)\; \text{10N and 10m} \\ (b)\; \text{10N and 10cm} \\ (c)\; \text{10N and 5m} \\ (d)\; \text{10N and 5cm} \end{array}$