What symbol indicates the range used for lower-sounding instruments and male voices?

Name the electronic effect that "cuts out" part of a video signal and inserts another signal into the space

a. key b. preview c. dissolve d. cross-fade

One device used in Grand Manner portraiture was to elevate the sitter by _____

a. giving the person a halo b. creating an architectural backdrop c. making the person large relative to the canvas d. dressing the person in ancient clothing