What should be done if a relief valve is leaking?

A、Openatapandrelievethetankpressureuntiltheflowstopsatthereliefvalve.
B、Remove,thevalveandcleanoffthecalciumdeposits.
C、Replacethereliefvalveandcheckforthecauseoftheactivation.
D、Replacethevalveseatandcheckforthecạuseoftheactivation.