Choose multiple answers $($more than one correct answer$)$

The railroad industry

is dominated by seven Class I railroads including BNSF$,$ Canadian National, Canadian Pacific, CSX$,$ Kansas City' Southern, Norfolk Southern, Union Pacific

is often to move goods with average shipment length of $805$ miles annually

requires high fixed costs in proportion to variable costs due to a large investment in terminals, equipment, and trackage.

is highly competitive because it comprised more than $1000$ of shortline carriers

is often used for the long$-$distance movement of low$-$value goods