Some early mornings, dew drops can be found on grass or a car parked outside,
but not on other materials such as the sidewalk why is that?
a. the nighttime temperature on grass and the car went below the dew point, but
the temperature of the concrete did not drop enough to reach the dew point
level
b. temperature on the grass and sidewalk were both above the dew point levels all
night
c. the relative humidity of the air above the grass was higher than it was above the
concrete
d. none of the above