Andy, Fergus, Evelyn, and Margaret are collecting cans for recycling. Before lunch, they have collected a total of 173 cans. At the end of the day, the total number of cans collected can be represented by the expression 173 1 n. What could the variable n in the expression represent if you know Margaret collected some cans in the afternoon? A combined number of cans all four collected in the afternoon B the combined number of cans Andy and Fergus collected in the afternoon C the number of cans Evelyn collected in the afternoon D the number of cans Fergus collected in the afternoon