Which of the following reactions is an oxidation process?

• A 2H\(^+\) + 2e\(^-\) \(\to\) H\(_2\)
• B 2O\(^{2-}\) + 4e\(^-\) \(\to\) O\(_2\)
• C OCl\(^-\) + H\(_2\)O + 2e\(^-\) \(\to\) 2OH\(^-\) + Cl\(^-\)
• D Cl + e\(^-\) \(\to\) Cl\(^-\)