The correct option is
C Elaborate
'Unfold' means to tell a story or explain something. E.g. The author unfolds a fantastic twist after a pause of 10 seconds. 'Elaborate' means to present a theory or system in detail. 'Stunt' means prevent from growing or developing properly. 'Compress' means to squeeze or press. 'Restrict' means to put a limit on or keep under control.
Thus, option D is the most appropriate answer.