Could one of you help me?

I have the following question...

Universal Containers manages opportunity forecasts using the standard forecast categories in Salesforce customizable forecasting. Each sales stage is aligned with a forecast category. When reviewing the forecast, Universal Containers wants the roll-up of just the opportunities that are in pipeline, best case, and commit.

What number in the forecast would provide Universal Containers with the appropriate information?

a. Pipeline + Closed/Won

b. Pipeline + Best Case

c. Pipeline

d. Pipeline + Commit

What is the best answer? According to me it should be Pipeline (c) and not Pipeline + Best Case (b)  because Client wants only pipeline, best case and comit.  If we include Best Case, then "closed/won opportunity amounts" also will come in that is not required. (https://help.salesforce.com/HTViewHelpDoc?id=newforecasts_categories.htm).

Thanks,

Suresh