What is an example of social darwinism

Don’t mind the already marked answer but taking it now

All of the following were weaknesses of the articles of confederation, except: a) the central government was not permitted to regulate state, interstate, or foreign trade. b) the central government was not permitted to borrow money. c) the central government had little ability to regulate money. d) the central government had no ability to tax.

Which of the following is not a requirement to become a us representative (congressman/congresswoman)?