How does column-based storage enable data to be read faster in SAP HANA?

How does column-based storage enable data to be read faster in SAP HANA?
A . Individual columns contain all of the information for ine record
B. Individual columns are read-optimized by writing into a main store and a delta store
C. Individual columns can be transferred to an SAP HANA optimized row-based format for faster access
D. Individual columns can be processed at the same time by different CPU cores

Answer: B