What was the greatest impact of social media on the revolution that followed the Iranian presidential election of 2009?

A. It was used by the public to organize political protests.
B. It was used as a platform to discuss new political campaigns.
C. It was used by the authorities to identify protesters in the uprising.
D. It was used to create a strong political bias against the elected officials.

How would i answer this for an exam?

Paraguay is one of the only two countries in the americas that don't have a coastal border. the country is slightly smaller than california. it was under a military dictatorship for 35 years, ending in 1989; today it is a constitutional republic. most of the population is roman catholic, and over 60% of the people live in cities. its environment is threatened by deforestation and water pollution. which of the following facts from the paragraph above best describes an element of paraguay's culture? (apex)

Which of the following types of nonrenewable fuel sources requires the storage of radioactive waste? a. coal b. nuclear c. solar d. oil