Question: How do I fix a toilet that runs?

  Options: 
 A. Flush the toilet and look for a fill valve leak. Lift up on the toilet float arm when the tank is filling to see if the water stops. Bend or adjust the toilet float arm so the tank stops filling when the water level is 1/2- to 1-in. below the bottom of the overflow pipe
 B. Flush the toilet and look for a fill valve leak. Lift up on the toilet float arm when the tank is filling to see if the water stops. Bend or adjust the toilet float arm so the tank stops filling when the water level is 1/2- to 1-in. below the top of the overflow pipe
Answer: B