Which Statement Best Summarizes Researchers' Views Concerning Subliminal Perception

Which statement best summarizes researchers' views concerning subliminal perception

A)  Subliminal perception does not influence behaviour, but it appears likely to have practical importance. 
B)  While subliminal perception may influence behaviour, it appears unlikely to have much practical importance. 
C)  Subliminal perception has no demonstrated effect on behaviour. 
D)  Subliminal perception may influence behaviour and it appears likely to have practical importance.