Fill in the blank with the appropriate answer.
When installing intermediate metal conduit (IMC), elbows, couplings and fittings in corrosive environments, such as in concrete or direct contact in the earth or areas subject to severe corrosive influences, the IMC shall be protected by corrosion protection and _________________.
A. have a “CE” marking or equivalent painted on it.
B. be identified with an orange color.
C. judged suitable for t