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.