Lisa wrote this expression to describe the number of chairs that were set up in the meeting hall. 8 × r Which situation could be described by this expression? A. Lisa knows there were a total of 8 chairs. She does not know how many rows there were. B. Lisa knows there were 8 seats in each row. She does not know how many rows there were. C. Lisa knows there were 8 rows altogether. She does not know how many seats were plastic. D. Lisa knows there were 8 seats altogether. She does not know how many seats were reserved.