Technician A says leaking vacuum lines can allow dirt to be drawn into an engine. Technician B says a horizontally mounted oil filter has an antidrainback valve. Which technician is

Technician A says leaking vacuum lines can allow dirt to be drawn into an engine. Technician B says a horizontally mounted oil filter has an antidrainback valve. Which technician is correct?
A)Technician A
B)Technician B
C)Both technicians
D)Neither technician

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