【求助】关于OG12-67中的代词指代问题

ltferltfer

67. Affording strategic proximity to the Strait of Gibraltar,
Morocco was also of interest to the French throughout
the first half of the twentieth century because they
assumed that if they did not hold it, their grip on
Algeria was always insecure.

(A) if they did not hold it, their grip on Algeria was always insecure
(B) without it their grip on Algeria would never be secure
(C) their grip on Algeria was not ever secure if they did not hold it
(D) without that, they could never be secure about their grip on Algeria
(E) never would their grip on Algeria be secure if they did not hold it

答案B

怎么选出来的我理解了，只是OG在C和E的解释中说道：

C    pronoun it is ambiguous and could refer to either Morocco or Algeria.
E   it could refer to either Morocco or Algeria.

这里的it怎么能指代Algeria呢？？ 如果说可能指代grip我还能理解。

hughlv

grip是抓牢的意思，怎么会用it来指代呢

Adacat

就近指代吧  与正确答案相比，Algeria的位置提前了。。所以可能引起it指代的ambiguous