I'd say the answer is A. As a form of proof that the product does what it claims to do by providing evidence.
Answer:
Blue is the colour of the mind and is essentially soothing; it affects us mentally, rather than the physical reaction we have to red. Strong blues will stimulate clear thought and lighter, soft blues will calm the mind and aid concentration. Consequently it is serene and mentally calming.
Explanation:
http://www.colour-affects.co.uk/psychological-properties-of-colours
Answer:
I have not seen that film yet.
Answer:
Maybe no one knows what you are asking about?
Explanation: