💡 Detailed Explanation
The verb '延期する' (enki suru) means 'to postpone' or 'to delay'. Thus, it can be rephrased as '遅らせる' (okuraseru), which means 'to push back' or 'to delay/slow down'. The other choices indicate opposite or different actions: '早める' means to move up/advance, '始める' means to start, and '終わりにする' means to finish.