What mountains did the first transcontinental railroad cross

The first transcontinental rail passengers arrived at the Pacific Railroad's original western terminus at the Alameda Mole on September 6, 1869 where they transferred to the steamer Alameda for transport across the Bay to San Francisco. The road's rail terminus was moved two months later to the Oakland Long Wharf about a mile to the north.

d) in the state of iowa

trade in silk, spices, and precious metals.

answer first choice