Which describes a major challenge facing the builders of the transcontinental railroad?
a.
bridging the rio grande river
b.
spanning the grand canyon
c.
tunneling under lake erie
d.
crossing the sierra nevada mountains

Which of the following is true about a merger? a. it is an example of deregulation. c. it is a combination of two or more companies into a single firm. b. it violates the sherman anti-trust act of 1890. d. it always leads to economic growth.

Humans during the paleolithic era used fire for each of the following purposes except a. for cooking meat b. for use as a weapon c. for heat and warmth d. for treating animal hides select the best answer from the choices provided

Describe the indian removal from north georgia. was the evacuation carried out according to plan? explain