The base of a solid S is the region enclosed by the graph of y = ln x, the line x = e, and the x-axis. If the cross sections of S perpendicular to the x-axis are squares,
which of the following gives the best approximation of the volume of s?
A) 0.718
B) 1.718
C) 2.718
D) 3.171
E) 7.388