With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Heavy water has the characteristic blue color of light water; this is because of the lack of molecular vibration harmonics, which in light water cause weak absorption in the red part of the visible spectrum. Thus, the spectrum shifts into the infrared, and heavy water do not absorb red light.
text_B: Heavy water absorbs what kind of light?
DON'T KNOW.