Which of the Following Is a Non-Economic Reason for Why

Which of the following is a non-economic reason for why more people are single?

A) They need to be geographically mobile to get a job.
B) More women today reject the idea that they are defined by their relationship status; they do not feel the need to have a boyfriend or husband as compared to earlier generations.
C) Expectations of a partner are lower today than they were in earlier generations, and people are more willing to settle when it comes to mate selection.
D) People who have lived independently for a period may feel more inclined to share their living space