Which of the Following Computations Would Provide a Measure of a Hotel's

Which of the following computations would provide a measure of a hotel's average room rate for a month?

A) Total letting revenue for the month / daily average rooms available.
B) Total letting revenue for the month /number of rooms sold in the month.
C) Total letting revenue for the month / total rooms available during the month.
D) Total letting revenue for the month /daily average rooms sold during the month.
E) Total letting revenue for the month / average room letting revenue during the month.