Jack’s parents were concerned with increasing acts of violence against Polish Jews in other parts of Poland, but they did not speak of these things in front of their children.

Jack’s parents were concerned with increasing acts of violence against Polish Jews in other parts of Poland, but they did not speak of these things in front of their children.

A – with increasing acts of violence against

B – with increasing acts of violence on

C – about increasing acts of violence against

D – about increasing acts of violence on 

E – over increasing acts of violence against

Right Answer: C

Error Identification

Identifier	Error Type
Concerned with, about, over	Idiom
Acts of violence on / against	Idiom

Explanation: 

The two identifiers are ‘concerned with / about / over’ and ‘acts of violence against / on’. Concerned can idiomatically go along with ‘with’, ‘about’ and ‘over’ but the meanings derived are completely different. ‘Concerned about’ is to be worried about; ‘concerned over’ is to care about something; ‘concerned with’ is to be interested in or associated with something. ‘Violence against’ is the correct idiomatic form. 

A – ‘concerned with’ changes the meaning and is illogical in context. 

B – ‘concerned with’ is incorrect; ‘violence on’ is unidiomatic. 

C – This is the correct answer. 

D – ‘violence on’ is unidiomatic. 

E – ‘concerned over’ means to care about someone / something and this distorts the meaning of the sentence.