A Vertically Integrated Information System May Perform Which of the Following

A vertically integrated information system may perform which of the following?

A) capture the initial sales data and produce invoices (acting as a transaction processing system)
B) summarize these data on a weekly basis for use by middle managers in tracking slow- and fast-selling items as well as productive and unproductive salespeople (acting as a decision support system)
C) analyze data for long-term trends for use by top managers (acting as an executive information system)
D) all of the above