The New Deal changed American political thinking because it was based on the principle that the - a. economy will fix itself if left alone.

b. political parties must work together to deal with national problems.

c. federal government should attempt to solve social and economic problems.

d. states should take a leadership position in solving social issues.

b isnt correct

Federal government should attempt to solve social and economic problems  ( C )

Explanation:

The New deal programs changed the way Americans viewed the role of the Government in the social and economic problems plaguing the country because the New deal programs were built on the principle that it is the duty of the federal government to actively get involved in resolving social and economic problems in the country.and not leaving it to private individuals or for the state governments alone.

The new deal programs had the federal government heavily involved by creating various jobs for both skilled,semi-skilled and unskilled and that way Americans were able to come out of the great depression and economic problems faced by them faster than anticipated.