Statement (I) : Down the group in VIA group elements ,  '-2' state becomes less significant.Statement (II) : Down the group in VIA group elements,  non metallic character increases.

Negative ox. states are characteristics of a non-metal.From Oxygen to Polonium , non-metallic character decreases , negative ox. state becomes less significantIn fact anion forming tendency is only for Oxygen and Sulphur.