The Transcontinental Freight Bureau set the rates for interstate shipment of infusorial earth. Wishing to confer an economic benefit to its local belt railway line, the State of Magnolia raised the freight rates for this commodity traveling on the belt line in interstate shipment. Such higher rates will:

A) Be upheld, in order to confer a benefit to the belt line being operated in Magnolia

B) Be upheld, if the increased revenue will benefit railroad workers who reside in Magnolia

C) Not be upheld, because the higher rates cause hardship to the shippers

D) Not be upheld because the rates for interstate shipment have to be uniform throughout the country