Multibeam sonar technology uses
a. more than one sound source and listening device
b. multiple beams of bouncing microwaves
c. more than one light source and viewing device
d. multiple beams of ocean-floor sediment

In the context of the box model, what is the difference between a margin and a padding? a. a padding lies outside a box border, while a margin lies inside it. b. a padding lies inside a box border, while a margin lies outside it. c. a padding can be adjusted independently, while a margin depends on the size of its box. d. a padding depends on the size of its box, while a margin can be adjusted independently.