Which of the Following Would Be an Example of the Influence

Which of the following would be an example of the influence of top-down processing?

A) Your perceptual system 'filling in' the missing information from the part of the visual field hidden by the blind spot.
B) Gradually being more sensitive to light after being in the dark for a period of time.
C) Not being able to identify the dotted figures in a test of colour-deficiency.
D) Seeing a normal Canadian flag after staring at a flag where the maple leaf and bars are green and the background is black for about a minute.