Please I need help with this. Whoever answers it correctly will get

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Which statement describes james chadwick’s discovery.

Which element is the least metallic between cadmium, silver, zinc, or iron?