One end of uniform wire of length L and of weight W is attached rigidly to a point in the roof and a weight W₁ is suspended from its lower end. If s is the area of cross section of the wire, the stress in the wire at a height (3L/4) from its lower end is 

• A

  $\frac{{\mathrm{W}}_1}{\mathrm{s}}$

• B

  $\left[{\mathrm{W}}_1+\frac{\mathrm{W}}{4}\right]/\mathrm{s}$

• C

  $\left[{\mathrm{W}}_1+\frac{3\mathrm{W}}{4}\right]/\mathrm{s}$

• D

  $\frac{{\mathrm{W}}_1+\mathrm{W}}{\mathrm{s}}$