A: at this point the diffraction images of both 30% and 33% do show a pair of dark bands. These bands are nearly missing in the 35% image.
B: Especially the 33% image shows a clear bright ring in this position. This rings is less prominent in the 35% and missing in the 30%
C:A clear bright ring in both 30% and 33% that is missing in the 35%.
D: a dark band that is most prominent at 35% and 33% but clearly less at 30%