Nowadays many university graduates are facing the __________ about whether they should apply for a job or pursue further study to get a postgraduate diploma.[ ]

A. position

B. dilemma

C. opportunity

D. possibility

把20厘米、16厘米的两根彩带剪成长度一样的短彩带且没有剩余，每根短彩带最长是______厘米．