Four different double-slit arrangements are proposed for observing the second-order bright fringe with 600 nm light. In which arrangement is the error introduced by the small-angle prediction most likely to be less than 1 %?
A. Slit separation 0.30 mm, order 2
B. Slit separation 0.10 mm, order 3
C. Slit separation 0.15 mm, order 4
D. Slit separation 0.05 mm, order 1
a) Arrangement B
b) Arrangement A
c) Arrangement D
d) Arrangement C