In Excel VBA $($Visual Basic for Applications$),$ what does the term "Macro" refer to$?$ a$.$ "Macro" is a function that calculates the AVERAGE or SUM of selected cells in a worksheet. b$.$ A "Macro" in Excel VBA is a type of error message generated when there is a syntax error in the code. c$.$ A "Macro" is a series of recorded mouse clicks and keyboard actions that can be replayed to automate repetitive tasks. d$.$ "Macro" is a built$-$in feature for encrypting and securing sensitive data within an Excel workbook. e$.$ A "Macro" is a specific type of chart that visualizes data trends and patterns in an Excel worksheet.