What's the most common act of terrorism in the 1800s

How did the completion of the transcontinental railroad change the lives of american citizens? a-it increased the wealth of all americans and enabled them to travel more.b-it made cross-country travel too expensive for ordinary americans.c-it decreased the safety of americans who moved to settle the plains.d-it shortened travel time between the east and west for all americans.

Article iv section 2 of the constitution define the relationship between the state and federal government by stating that

In 1990s the us closed clark air force and subic bay naval station in