Visitor Days as a Measure of Demand Is

Visitor days as a measure of demand is:

A) the number of visitors arriving at a destination each day for a year.
B) visitor arrivals x average length of stay.
C) number of days spent by visitors of one community/area in another destination.
D) expenditures by tourists in an area.
E) the total number of days spent by tourists at commercial lodging establishments in an area.