In each of the questions below, there are four statements which express the same idea. Choose the alternative that is most concise and clear.
A. The dull are likely to have a limited conceptual grasp.
B. It is unlikely that the dull would have adequate conceptual grasp.
C. The dull are not likely to grasp concepts easily.
D. It is unlikely that the dull can grasp concepts easily.
E. None of these.
Option C is the most concise and clear.