Which of the following aspects of Afghanistan is NOT described in the. passage

A．In the U. S. , commuter railroad service, trolleys and buses have been reduced.
B．Subways have largely been maintained.
C．Fares usually could not cover operating costs.
D．U.S. public officials think it worthwhile to subsidize public transportation.

A．an infant prodigy performs much better than ordinary kids
B．developmental psychology is an interesting subject
C．babies can learn intricate tricks so long as they are trained
D．toys are important tools to teach science with