Question: UFelicia waphenya ukuthi umbala wamanzi uyakuthinta yini ukuthi amanzi ashesha kangakanani ukushisa ekukhanyeni kwelanga. Wathela amanzi empompi kojeke abahlanu wafaka okokwenza umbala wokudla kojeke abane kwabahlanu. UFelicia wabe esesebenzisa i-thermometer ukukala izinga lokushisa lamanzi kujeke ngamunye. Yikuphi kuloku okwasetshenziswa njenge-control ophenyweni lwakhe?
Options:
ukuxuba okokwenza umbala wokudla emanzini
ukuhlola ujeke wamanzi empompi anganembala
ukusebenzisa inani elifanayo lamanzi esivivinyweni ngasinye
ukuhlola amasampula amanzi anombala ngezikhathi ezahlukene
Answer: B