Antonym of DITHER

Answer: Option C

Dither : be indecisive.
Cry : shed tears, typically as an expression of distress, pain, or sorrow.
Refer : mention or allude to.
Decide : come or bring to a resolution in the mind as a result of consideration.
Defer : put off (an action or event) to a later time; postpone.

Antonym of Dither is Decide