Using the map below, which number labels the land bridge that people used to migrate to North America? Question 7 options:

2

3

1

4

American troops were worried about cantracting in cuba a. yellow fever b. hepatitis c. polio

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

To encourage railroad companies to build railroads across the west, the government gave them subsidies by select the best answer from the choices provided. a. paying the wages of laborers b. giving them building materials c. providing railroad trains d. providing free land