请教GWD一到题

GWD1-Q2:

By merging its two publishing divisions, the company will increase their share of the country’s $21 billion book market from 6 percent to 10 percent, a market ranging from obscure textbooks to mass-market paperbacks.

1. their share of the country’s $21 billion book market from 6 percent to 10 percent, a market ranging

2. from 6 percent to 10 percent its share of the $21 billion book market in the country, which ranges

3. to 10 percent from 6 percent in their share of the $21 billion book market in the country, a market ranging

4. in its share, from 6 percent to 10 percent, of the $21 billion book market in the country, which ranges

5. to 10 percent from 6 percent its share of the country’s $21 billion book market, which ranges

1. its和their 一个考点 2.country's 和 in the country

3. 我想问关于which的考点

可是GWD里面选B country's对吗？？我觉得which前也应该接market