Answer:
Option C. Has diminished since 1960, but a gap still remains.
Step-by-step explanation:
The reason is that accepting change is the long process and every person have different stories. Mostly people don't value person and what they do is they value things on the basis of what they perceive about things. They perceive things on the basis of similarities of that thing with the other. We must treat people fairly and not on the grounds that nature has not given him right to change (Color) or things that are acceptable in our society but we try to force them to not do things (Practicing religion) just because I don't like. In the nutshell, such type of thinking still exist and is the reason why there is a earning gap in the US.