[单选题]

The passage is intended to _____________
A． warn us of the danger in the subway
B． show US how to save people in the subway
C． tell US about a subway rescue
D． report a traffic accident

The passage is intended to _____________A． warn us of the danger in the subwayB． show US how to save people in the subwayC． tell US about a subway rescueD． report a traffic accident