B. , Neutral.
Primary colors are Red, Blue, and Yellow.
Secondary colors are Orange, Purple, and Green.
Complimentary colors are two colors that compliment each other. For example. yellow and purple, green and red, and lastly blue and orange.
That leaves Neutral to represent the gray scale.
Dude you actually have to post the pictures for us to answer the questions...
B they tend to promote because training and getting people ready takes a lot and they want to keep them there as long as possible instead of paying to retrain people all the time
