A regional manager for a small quick-service chain had stopped to check in on one of her stores unfortunately , she had not visited the store for several months . As the manager walked around , she noticed that there was a build up of grease on the kitchen walls and ceilings . She also noticed condensation dripping from these areas .

It is the problem with the plumbing system. The regional manager should check all the pipes to identify leak and fix it as soon as possible. Afterwards the regional manger should re-organize the pipes it is easily accessible, installed by a licensed plumber, and cleaned periodically according to the manufacturer's recommendations

Explanation:

all of them except "c"

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