A centrifugal pump is operating at a flow rate and head given by the intersection of its H-Q curve with the load H-Q curve, near its maximum efficiency point. If water level in the sump, from where water is being pumped, increases, then the operating condition will shift to:

• A. Higher head and lower flow rate
• B. Higher flow rate and higher head
• C. Higher flow rate and lower head
• D. Lower head and same flow rate