Options A,B,D,E say :
'Manifestation led to...' which is wrong. Manifestation cannot led to anything.
Option C says :
'British Empire's policy was manifested to...' which is correct use.
So we are left with only one option, which is correct one.
'Manifestation led to...' which is wrong. Manifestation cannot led to anything.
Option C says :
'British Empire's policy was manifested to...' which is correct use.
So we are left with only one option, which is correct one.





