Answer:
4. we timed ourselves during the experiment
I’m not sure what text you are reading but we haven’t achieved full equality yet with race, there are still forms of segregation and racism in everyday activities that should be easy for people of color as they are for quite people.
This should be a writer's opinion
That is because it might differ based on who was talking. Some might disagree that it has become run-down, or some might say that it has become such way before "just recently".
