Three major differences between anti-catholic sentiment and anti-mormon sentiment.

A Mormon chief was slaughtered by the individuals who didn't share the Mormon faith, however no Catholic religious leaders were executed.  

Catholics dealt with segregation when they were migrating because of local nativism, while those who were hostile to Mormon had different reasons.

Anti-Mormon discrimination incorporated a compulsory relocation, while those hostile to Catholics didn't go that far.

your answer would be (a)

syria

tens of thousands of people were killed in as it’s longtime leader attempted to stay in power.