I'll first explain what the non-aggression pact was. It was an agreement that the Soviet Union and Germany would take no military action against each other. To answer your question it is B. The pact was to make sure he could safely attack Poland.
Answer:
In this fashion the odometer, called the roadometer, was invented in 1847 by the Mormon pioneers crossing the plains from Missiouri.
Explanation: The odometer was attached to a wagon wheel as the wagon trav- eled. It was developed by William Clayton and Orson Pratt, and built by carpenter Appleton Milo Harmo
Thomas Jefferson, a spokesman for democracy, was an American Founding Father, the principal author of the Declaration of Independence (1776), and the third President of the United States (1801–1809).
The oldest book would probably have to be The Bible...
George Washington, Thomas Jefferson, Ben Franklin, John Adams, John Jay, Alexander Hamilton, James Madison. Thank me later.