I don't know why the government doesn't do more to help unemployed.

Explanation

"Unemployed" is an adjective describing individuals without jobs. However, in this context, it should be "the unemployed" to refer to unemployed people collectively. There is an error hereThe error in the sentence is the use of "unemployed" without the article "the." The correct phrase should be "to help the unemployed," referring to people who are unemployed in general. Thus, the correct option to mark the error is D) Unemployed.