What does a vertical line to the left of multiple staves indicate to a musician

John, a graphic designer, is working for a client who is planning to build and sell new homes. john’s client asks him to create a presentation for potential homeowners. the potential homeowners need to see a vivid representation of what their finished home will look like. what kind of graphic artwork should john produce? a. physical 3d color paintings b. digital 3d images c. digital 2d drawings d. physical 3d paper models e. ical slide images