Eight points are spaced around at intervals of one unit around a 2×2 square, as shown. Two of the 8 points are chosen at random. What is the probability that the two points are one unit apart?
[asy]
size((50));
dot((5,0));
dot((5,5));
dot((0,5));
dot((-5,5));
dot((-5,0));
dot((-5,-5));
dot((0,-5));
dot((5,-5));
[/asy]
<spanclass=′latex−bold′>(A)</span>41<spanclass=′latex−bold′>(B)</span>72<spanclass=′latex−bold′>(C)</span>114<spanclass=′latex−bold′>(D)</span>21<spanclass=′latex−bold′>(E)</span>74