What is the inspection concern shown here?
a. A chemical reaction between the concrete sealer and the grout used to embed the steel post has caused permanent discoloration.
b. Corrosion of inadequately-protected steel exposed to weather has discolored the concrete. Discoloration will continue.
c. Expansion of embedded steel corrosion products will eventually damage the concrete.
d. Impact has loosened the post, making the handrail unsafe.