A．He thinks it resolves most of the major questions about distraction.
B．He feels it is of limited use because of flaws in the study designs.
C．He believes it has changed the direction of research on distraction.
D．He thinks its findings can be applied only to visual distraction.

A．The plant absorbs different wavelengths of light. 
B．The plant begins to flower or Stops flowering. 
C．The plant will grow taller when absorbing more light.
D．The plant influences each other using the light.

A．They appear identical to red wavelengths to the human eye.
B．They have the same effects on plants as red wavelengths do.
C．They travel shorter distances than red wavelengths do.
D．They are not perceived as red by the human eye.