I think it’s B, but i could be wrong
Sun's particles travels through the windshield and hit the bar, the light will be changed to heat, so<span> radiation of the sun through the windshield</span>
Star brightness is defined by either <span>D. apparent magnitude - when we measure it from Earth (that is how bright it is from Earth) - this is the closest to "basic observation" and the best answer
or by absolute magnitute - how bright it would be at a certain distance (this allows to compare the brightness).
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