$\begin{array}{1 1} (a)\; \text{so that a large pressure is exerted on the hand while carrying them }\\ (b)\; \text{so that a small pressure is exerted on hand while carrying them}\\(c)\; \text{so that the thrust is exerted over a small area} \\ (d)\; \text{it has the greatest area of contact between them} \end{array}$