The word "it" (line 5, para 1) refers to______.

A．a device for stimulating atoms and molecules to emit light
B．an atom in a high energy state
C．a technique for destroying atom or molecules
D．an instrument for measuring light waves

A．poetry tends to make the reader disappointed
B．poetry makes its readers sentimental
C．poetry is more important than words
D．poetry often captures real human feelings