In data preparation, we should be aware of leaks. Which of the following statements is true of a leak? A. A leak occurs when a variable present in historical data offers insights into the target variable, but it is not actually available or accessible when real-time decisions need to be made. O B. A leak is a situation where a variable collected in historical data gives information on the target variable and is also available when the decision has to be made. O C. We should always include leaks in our prediction model because they can lead to unbiased or accurate predictions. O D. Because leaks provide information on the target variable, we should include them in our prediction models