What is the Bex options for characteristics like F4 help for query definition and execution? | SAP BW INterview Questions

This defines how the data is displayed in query definition screen or when query is executed; options are from the data displayed, from master data table (all data) and from dimension data; for example let us assume that you have 100 products in all, 10 products in a cube; in bex you display the query for 2 products; the following options for product will display different data
a. selective data only    — will display 2 products
b. dimension data    - will display 10 products
c. from master data    - will display all 100 products