Which of the following was the only U.S. president to resign from office?

Which of the following raise money from individuals and then distribute it in the form of contributions to political candidates?

a. 527 organizations
b. coordinating committees
c. 501(c)3 organizations
d. political action committees

e. iron triangles

A meta-analysis gives more weight to a study

A) with more participants. B) from a research university. C) with more authors. D) with positive results.