Answer:
C. Both technician A and technician B are correct
Step-by-step explanation
Engine performs at its best with clean oil. That's why oil filters work to sift out particles (some so small that humans can't see ) to keep contaminants out of the oil. Dirty or clogged oil filters allow contaminants to sail straight to the engine where they can cause damage as well as affect fuel economy.
Over time If the oil filter is changed regularly it will filter perfectly clean oil,