A TAB technician determines that the total airflow entering the return grilles is much lower than the amount of air the blower is moving. This indicates that:

A) There are leaks in the supply-side ductwork.
B) There are leaks in the return-side ductwork.
C) There is too much restriction in the return-side ductwork.
D) There is too much restriction in the supply-side ductwork.


B

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