Which of the following statement is incorrect regarding non$-$reporting hotels and industry data?

a$.$ The U$.$S$.$ is the only country where property data is modeled for non$-$reporting hotels.

b$.$ The numbers for industry segments in the U$.$S$.$ are based on a combination of Actual and Modeled data.

c$.$ Outside the U$.$S$.,$ the numbers for industry segments are solely based on Actual data.

d$.$Modeled$$ means $$aggregated$.$