【求助】白勇上同位语的一道题

The capital of Bostia-Herzegovina, Sarajevo's population on the eve of the First World War was 51,919.

A Bostia-Herzegovina, Sarajevo's population

B Bostia-Herzegovina is Sarajevo, whose population

C Bostia-Herzegovina is Sarajevo, with a population

D Bostia-Herzegovina, Sarajevo having a population that

E Bostia-Herzegovina, the population of Sarajevo

答案是B，能做出来，但有个疑问，原句主句是“人口是多少”，用B是不是有点改变句意的意思啊？主句变成“首都是哪儿了”。

诚心求教~

对！