The area of the region enclosed by the curves $ y = x,\; \; x = e, \; \; y = \frac{1}{x}$ are the positive x-axis is

Question

( A ) $\frac{5}{2}$ sq. units
( B ) $\frac{1}{2}$ sq. units
( C ) $1$ sq. units
( D ) $\frac{3}{2}$ sq. units