the builders of the transcontinental railroad used legal and illegal means to cut costs and finance construction. which of the following were legal means? (select all the choices that apply.)

a.
giving building contracts to themselves

b.
overcharging the government for work

c.
receiving government aid

d.
allowing poor and unsafe workmanship

e.
selling stock in their companies

name two ways organisms join a population and two ways organisms leave a population. two ways organisms join a population are birth rate and immigration. two ways they leave are death rate and emigration.

explanation:

lincoln presided over the union victory in the american civil war, which dominated his presidency. a former whig, lincoln ran on a political platform opposed to the expansion of slavery in the territories. his election served as the immediate impetus for the outbreak of the american civil war.