The correct answer is 4.
When displaying artworks you need to take into consideration how the elements could possibly damage the art. Artworks are fragile and need to be preserved. Ultraviolet rays from the sun fades paint pigments and the painting will lose it's original colors and vibrancy therefore keeping it out of direct sunlight is best. High temperatures and humidity will damage the painting making it curl or peel or moisture will build up on the surface damaging the paint therefore controlling the temperature and humidity will keep this from happening.
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Many protestants did not believe in icons or ornate churches, that’s why many protestant churches are arid and plain. medieval artisans portrayed god and biblical scenes but many thought that art was only there to serve the holy god