I would think it should be , b or d
It is a quote made when slavery was there is the United States, when most of the people tried to discriminate people on the basis of their race.
If you're asking in Grammatical aspect, then there is nothing complex in this sentence, just means, that if you are black that it's a bad thing [ just by this quote ]
Hope this helps!
B. depth
Having depth means the opposite of being superficial. To get a measure of depth, one must measure in a downward manner. (for the ex: to measure the depth of the Caribbean Sea, we need to measure from the surface to the floor. That would be our depth measure).
