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>
Gained more credibility evidence for the people places and events
There are many artistic tasks that the monks and nuns performed at the time. Here are some of such options:
1. painters - given that they had some free time, monks and nuns resorted to painting to kill time
2. weavers - nuns would usually weave or embroider in order to create beautiful patterns of cloths
3. carvers - especially monks did this - carving wooden objects was a good way to both train and entertain themselves
