The answer is D I believe
B) herman von helmholtz
The trichromatic color theory<span> began in the 18th century, when </span>Thomas Young<span> proposed that color vision was a result of three different </span>photoreceptor cells<span>. </span>Hermann von Helmholtz<span> later expanded on Young's ideas using color-matching experiments which showed that people with normal vision needed three wavelengths to create the normal range of colors. Physiological evidence for trichromatic theory was later given by </span>Gunnar Svaetichin<span> (1956).</span>
Do you even know what an eight track is?
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.