An ________ outcome is one that is caused by multiple independent variables, the separate and interactive effects of which are not clear.

In 1981, ________ became the first woman justice on the Supreme Court

a. Elena Kagan b. Sandra Day O'Connor c. Ruth Bader Ginsberg d. Sonia Sotomayor e. Georgia Bullock

Among the characteristics of a state, the European Union lacks

a. its own currency. b. a military force. c. diplomatic recognition by major nation-states. d. an official language. e. a distinctive flag.