Answer:
A pump is running at a rate is 96 gal / hr.
Option (C) is correct .
Explanation:
As given
A pump is running at a rate of 6.4 quarts per minute.

As 1 quarts = 0.25 gallons
1 minute = 0.0166 hour
Now convert quarts per minute into gallons per hour .


Rate = 96.4 gal/ hr(Approx)
Best estimate of rate is 96 gal / hr.
Therefore a pump is running at a rate is 96 gal / hr.
Option (C) is correct .