What did the Mayans develop?

bow and arrow
horses
numbering system
clock

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.

Which fact would this be, and how might you verify the truth?

Which of the following were lyndon johnson's goals as president?