The answer is not A, because it is not clear enough. Who's we?
The answer is not B, the sentence is not clear about the building they are visiting.
The answer is not C, it's not clear about what building they are talking about.
So your answer is D.
I Have to say a Rhyme Because, Give and Live Rhyme and I'm Sure its none of the other ones
Explanation:
However, because their retinas' contain only about one-tenth the concentration of cones (that humans have), dogs do not see colors as humans do. Dogs see like a color-blind human. ... Seeing-eye dogs, for example, may not distinguish between a green or red stoplight; they look at the brightness and position of the light.
