在晚秋或寒冬,用人造烟幕来防御霜冻的原理是( )
A:增强太阳短波辐射
B:增强大气逆辐射作用
C:增强大气对太阳辐射的散射作用
D:增强大气对太阳辐射的反射作用
I was late for class yesterday __________ there was something wrong with my bike.