Which of the following is the largest defined unit of time on the geologic time scale?
a. age
b. period
c. era
d. eon

a macro is a tool that allows you to automate tasks and add functionality to your forms, reports, and controls. for example, if you add a command button to a form, you associate the button's onclick event to a macro, and the macro contains the commands that you want the button to perform each time it is clicked.