The bottom$-$up method for forecasting sales

A relies on the ability of complex statistical models to predict individual unit or regional sales figures, which are added together and reported to senior managers

B relies on the ability of senior managers to determine sales objectives for their company's product and inform personnel about targets for each business unit

C relies on the ability of sales personnel to correctly apply statistical models in order to obtain firm$-$wide objectives for increased sales

D

relies on the ability of sales personnel to assess future demand, usually without the aid of statistical models