{{B}}pAssAgE Four{{/B}}

unDEr whAt CirCumstAnCE CAn wE tEll An ACCiDEnt is proBABly CAusED By slEEpinEssA．iF trAFFiC is light AnD vEhiClEs ArE wEll-spACED on thE roAD、
B．whEn thErE is only onE CAr involvED in thE ACCiDEnt.
C．iF thErE is no skiD mArks or othEr signs oF BrAking on thE roAD、
D．All oF thE ABovE.