Briefly describe what the symbol x represents. Choose the correct answer below. A. The symbol x is a variable that represents the area of each region. B. The symbol x is a variable that represents the mean number of occurrences of the event in the intervals. C. The symbol x is a variable that represents the number of occurrences of the event. D. The symbol x is a variable that represents the number of occurrences of the event in an interval. E. The symbol x represents a static value.