TABLE 10-1 -Refer to Table 10-1,which Displays the Demand Schedule for a for a Single-Price

TABLE 10-1
-Refer to Table 10-1,which displays the demand schedule for a single-price monopolist.At what level of output is total revenue maximized for this firm?

A) between 6 and 7 units
B) between 7 and 8 units
C) between 8 and 9 units
D) between 9 and 10 units
E) between 10 and 11 units