In a Thin Layer Chromatography analysis if the Rfs of the sp

In a Thin Layer Chromatography analysis if the Rf\'s of the spots are too small,
A- a spotting solvent of higher polarity should be used.
B- a different method of visualization should be used.
C- a development solvent of higher polarity should be used.
D-a development solvent of lower polarity should be used.
E- a spotting solvent of lower polarity should be used.

Solution

C- a development solvent of higher polarity should be used.