Part A contains provisions common to the control of all three pollutants.
All three pollutants are mentioned in Part A.
The provisions in Part A are for a single and specific pollutant.
the woman is raking leaves
The cars are parked in a showroom.
A human holds a craw
The museum Musee Rodin has a marvelous sculpture garden and a children's play area.
Who's the author of the piece of gold?
A man is playing an instrument.