In an explanatory essay, or any essay, the introductory paragraph introduces (hence it's name) the main idea, or what you are going to explain. The body paragraphs go into extreme detail of what the introductory paragraphs mentioned.
Answer:
Jefferson assumed the office after defeating incumbent President John Adams in the 1800 presidential election. ... Jefferson took office determined to roll back the Federalist program of the 1790s. His administration reduced taxes, government spending, and the national debt, and repealed the Alien and Sedition Acts.
Explanation:
D. Berlin
On 20 April 1945, Hitler's 56th birthday, Soviet artillery of the 1st Belorussian Front began shelling Berlin and did not stop until the city surrendered.
Answer:
The Hartford Convention
Explanation:
"This mostly Federalist convention in New England ended up suggesting some constitutional amendments but was alleged to consider the secession of New England from the Union and a separate peace with Britain. After the war the convention was widely viewed as an act of treason and a black mark on the reputation of the Federalist party."
StackExchange - History
option d is correct for me