Which of the following was a significant challenge in building the panama canal

Is this statement true or false? before 1850, workers in american mines, mills, and factories were poorly paid, but their safety on the job was always protected by strict laws.

Mississippi, florida, alabama, georgia, louisiana, and texas all seceded from the union. true or false ?

According to the map, most mining occurs in the a. northern b. southern c. eastern d. western