All of the following statements are true EXCEPT:
A. if 100 grams of dirt enter the filter housing and 99 grams are filtered out, the filter is said to be 90% efficient.
B. the air filter must allow enough air to pass at the engine's maximum speed to not interfere with flow.
C. capacity is the amount of dirt an air filter can hold before it becomes restricted.
D. there must be a balance of efficiency, flow, and capacity for a filter to be effective.
Answer: A
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