A Lab Orders 100 Rats a Week for Each of the 52

A lab orders 100 rats a week for each of the 52 weeks in the year for experiments that the lab conducts.Suppose the mean cost of rats used in lab experiments turned out to be $13.00 per week.Interpret this value.

A) Most of the weeks resulted in rat costs of $13.00.
B) The expected or average cost for all weekly rat purchases is $13.00.
C) The median cost for the distribution of rat costs is $13.00.
D) The rat cost that occurs more often than any other is $13.00.