With regard to environmental sustainability, which of the following explains advantage of urban light-rail networks in Europe and East Asia compared to most light-rail systems in United States cities? Light-rail is integrated with fast commuter railroad networks and subways and extends out to multiple suburbs.

Light-rail is integrated with fast commuter railroad networks and subways and extends out to multiple suburbs.

Light-rail networks connect locations in downtown central business districts.

Light-rail networks connect locations in downtown central business districts.

Light-rail stations tend to be simple boarding platforms that do not have parking areas.

Light-rail stations tend to be simple boarding platforms that do not have parking areas.
C

Light-rail lines tend to lack a large central train terminal for passengers to transfer between trains headed in different directions.

Light-rail lines tend to lack a large central train terminal for passengers to transfer between trains headed in different directions.
D

Light-rail lines often work on the honor system where a pass or permit is used to ride the train and there may be random ticket checks.