What does the empty ones mean (definition)

From 1990 to 2008, by what percent did the world’s most developed economies cut their greenhouse gas emissions?

Which of the following events happen during president hardings term? a) the supreme court decided to break up large corporations. b) the supreme court strength and state laws protection labor union. c) the supreme court ruled in favor of extended regulations of child labor. d)the supreme court made it easier for large businesses to operate.

Who is the party in a civil case against whom a complaint has been brought?