Which of the Following Statements About 'Hierarchical Databases' Is Correct

Multiple Choice

Which of the following statements about 'hierarchical databases' is correct?

A) Permits access to customer data by account number but may not allow for easy extraction of data
B) Permits multiple access points to data and is more flexible in terms of extracting data
C) Data are stored in two-dimensional tables,where each table is linked by common keys and where data is very easily manipulated
D) A database used for market segmentation studies and target market profiling
E) A data warehouse or archive