The Dew point temperature can be broadly defined as the temperature at which saturation occurs. Considering that, which of the following statements about the dew point is most accurate?

A) The saturation can be identified when the dew point temperature is the same as the air temperature.
B) A low dew point temperature means a low water vapor concentration.
C) A high dew point temperature means a higher water vapor concentration.
D) All the alternatives are correct.