The correct answer is 'a.' Key Points - The error lies in Part (a) of the sentence. - We are thinking about a particular condition in the future and the result of this condition. - But there is not a real possibility that this condition will happen. - You use the phrase "if I were..." when you are using the subjunctive mood. - The subjunctive is used to talk about hypothetical situations or things that are contrary to fact. - Example: If I won the lottery, I would buy a car. - Therefore, the use of 'am' in Part (a) of the sentence should be replaced by 'were' to make it grammatically correct. - Correct sentence: If I were the principal of the school I would abolish all examinations.