A Monochromatic Light Is Incident on a Young's Double Slit

A monochromatic light is incident on a Young's double slit setup that has a slit separation of 30.0 μm. The resultant bright fringe separation is 2.15 cm on a screen 1.20 m from the double slit. What is the separation between the third-order bright fringe and the zeroth-order bright fringe?

A) 8.60 cm
B) 7.35 cm
C) 6.45 cm
D) 4.30 cm
E) 2.70 cm