Two technicians are discussing fuel trim. Technician A says that oxygen sensor activity determines short-term fuel trim numbers. Technician B says that a positive (+) long-term fuel trim means that the computer is adding fuel to compensate for a lean exhaust. Which technician is correct?
a. Technician A only
b. Technician B only
c. Both Technicians A and B
d. Neither Technician A nor B
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