Hi - Can you please explain the following: If Abraham Lincoln were born in Livonia, he cannot become the president of the United States. I understand the explanation for the 2nd error: "cannot become" should be "could not have become". But I still do not understand why "were...

Ben - Did you mean the answer is "C", and not "A"? Ultimately we need to get (Errors by B) / (Customers of B). this is our rephrased quantity. I think it's clear that statement (2) is insufficient to answer the question, so let's focus on statement (1). Statement (2): The overall...