Answer:
II really have no idea but it might be A?
Explanation:
If I'm wrong I'm so sry T-T
When a ray passes<span> from air into glass the </span>direction<span> in which the </span>light<span> ray is traveling </span>changes<span>. ... This bending of a ray of </span>light<span> when </span>passes from one substance<span> to </span>another substance<span> is called refraction. Hope this helps!!!</span>
<span>The celestial sphere is a coordinate system that uses the Earth as a reference. Declination indicates how far north or south from the celestial equator an object is. Right ascension indicates how far east or west from the vernal equinox an object is.</span>
A makes the most sense, though D could actually be an Ok reason, the other two aren't reasonable, a fire safety action? The door would be better open in a fire emergancy, it makes a quicker escape
