Who prepare human right manifesto

Eleanor Roosevelt

Explanation:

the wife of US President Franklin D. Roosevelt, wrote a special document which “declares” the rights that everyone in the entire world should have—the Universal Declaration of Human Rights.

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.

i would say b. research typically uses a variety of sources