Which raw materials had to be shipped to the construction sites in large quantities because they were essential for building the railroad tracks? coal and oil silver and wood oil and iron iron and wood

The correct answer is D) iron and wood.

The raw materials that had to be shipped to the construction sites in large quantities because they were essential for building the railroad tracks were iron and wood.

The Pacific Railroad Act of 1862 allowed the construction of a transcontinental railroad to connect the East coast of the United States with the West coast. The Union Pacific Railroad and the Central Pacific were the two companies that could receive the task to accomplish this important feat. They worked for seven years to connect the railroads from Omaha, Nebraska to Sacramento, California, until they finally met on May 10, 1869, in Promontory Utah.

to kill a mockingbird is a 1962 american drama film directed by robert mulligan. the screenplay by horton foote is based on harper lee's 1960 pulitzer prize- winning novel of the same name. it stars gregory peck as atticus finch and mary badham as scout. in 2003, the american film institute named atticus finch the greatest movie

hope this : d

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: