Matching -______ on Some Cascading Logic Switchers, the Row of Video

Matching
-______ On some cascading logic switchers, the row of video source pushbuttons that allows the operator to pre-select a source to be keyed over the Program Background video.

A) Bank
B) Box Wipe
C) Bus
D) Cascading effects
E) Central Dynamics logic
F) Chroma key
G) Cut
H) Digital Picture Manipulator
I) Dissolve
J) DSK
K) Effects Bank
L) Effects Bus
M) Fadeout (or Fadeup)
N) Graphic Camera
O) Graphic Stands
P) Gen-locked
Q) House sync
R) Key
S) Key Bus
T) Key Card
U) Matte Key
V) Mechanical Effects
W) Mix
X) On-line
Y) Open architecture
Z) Preview Bus
Aa) Program Bus
Bb) Quadruple (or triple, or double) Re-entry switcher
Cc) Super (Superimposition)
Dd) Switcher Architecture
Ee) Synchronization (Sync) Generator
Ff) Vertical blanking interval (VBI)
Gg) Warping
Hh) Wipe Key
Ii) Wipes