The correct options are
A Punjabis were mistreated abroad.
C Shipping companies did not want to ferry Indians to Canada as they feared denial of entry upon arriving in Canada.
D Indians faced persecution when they migrated to other countries.
Owing to the economic exploitation of the British, Punjabis migrated to other countries. They were mistreated in these countries because they hailed from a ‘slave’ colony.
When Canada removed the restrictions imposed on Indians, Punjabis showed interest in going there. However, shipping companies were not ready to ferry them there fearing denial of entry by the Canadians.