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.
-Based on what she has learned,which of the following would Rina say is a true statement about digital signatures?

A) Adding a digital signature is the first step before you distribute a file.
B) A digital signature is often used to identify the author of a workbook that contains macros.
C) Before you can add a digital ID to a workbook, you need to obtain a digital signature.
D) Digital certificates are usually issued by Microsoft.