How do you determine if a element or compound is an oxidizing agent or acid? 
A) Check if the substance gains electrons in a reaction, indicating its role as an oxidizing agent. 
B) Assess if the substance donates protons (H⁺ ions) in a reaction, indicating its role as an acid. 
C) Examine the substance's ability to facilitate the oxidation of other substances. 
D) Test the substance's pH to determine its acidity level.