A square wire of side `3.0 cm` is placed `25 cm` away from a concave mirror of focal length `10 cm`. What is the area enclosed by the image of the wire ? The centre of the wire is on the axis of the mirror, with its two sides normal to the axis.
A. `7.5cm^2`
B. `6.0cm^2`
C. `4.0cm^2`
D. `3.0cm^2`