Here's the official def:
Deep focus<span> is a photographic and cinematographic technique using a large depth of field. Depth of field is the front-to-back range of </span>focus<span> in an image — that is, how much of it appears sharp and clear. In </span>deep focus<span> the foreground, middle-ground and background are all in </span>focus<span>.</span>
I believe it is B hope this helped you<span />
Grúas semi pórtico, carretilla pórtico, side lifter, grúas torre, grúas puente, grúas flotantes... y mas
Espero q esto te ayude! :))
<span>the answer is: the same background color on all visuals and no more than two colors for words.</span>
