I believe the answer is: C. Decoration
In fashion, decoration refers to the external elements that added to the cloths in order to make it look more attractive.
In Victorian female Fashion for example, we could see the decoration resided mostly on the knee level to the chest level of the clothing.
True color is the specification of the color of a pixel on a display screen using a 24-bit value, which allows the possibility of up to 16,777,216 possible colors.
C. the amount of time it takes to obtain imported flowers