Looking for answers? Westonci.ca is your go-to Q&A platform, offering quick, trustworthy responses from a community of experts. Discover solutions to your questions from experienced professionals across multiple fields on our comprehensive Q&A platform. Connect with a community of professionals ready to provide precise solutions to your questions quickly and accurately.

Which of the following statement is correct?
A. Two dissimilar metals are physically joined. Under all circumstances, the one that corrodes is always the more anodic one.
B. Corrosion is always harmful.
C. Two pieces of same metal are joined by a bolt leaving a gap in between. Galvanic corrosion occurs when the metal pieces are immersed in water for weeks.
D. An oxidation reaction occurs only in an environment having oxygen.