Rina Has Just Completed Some Coursework in Excel Application Writing

Multiple Choice

Rina has just completed some coursework in Excel application writing and wants to begin developing her own macros to share more widely. She knows that she has to learn more about digital signatures in order to make her plan a reality.
-Which of the following can Rina tell when she opens a digitally signed file?

A) Who the author of the file is
B) Whether the information in the file is correct
C) Whether the macros in the workbook will produce accurate results
D) Whether the macro will perform as expected