Which sentence contains an essential adjective clause?
the coach explained the rules that the officials revised in 2010
the coach, an expert in the sport, explained the revised rules to us.
after explaining the rules to us, the coach released us to the field
the officials revised the rules, which the coach explained to us before practice.

the correct answer is option d. the nature of democracy. on november 19, 1863, president abraham lincoln delivered his famous gettysburg address in gettysburg, pennsylvania. in his speech, rather than focusing on details of the war (soldiers, casualties, aftermath of battle), lincoln invoked the very nature of democracy, that power ultimately comes from the people, when stating, “government of the people, by the people, for the people shall not perish”. these words mean that democracy is a government by the people (citizens) in which the supreme power is vested in the people and exercised directly by the people or by their elected representatives for the benefit of all citizens. the survival of democracy in the united states is one of the reasons why this speech so significant today.

a. it reminds protestors of the reasons they have to protest.