Julie Probably Would Feel Most Dissatisfied with Her Relationship with Steven

Julie probably would feel most dissatisfied with her relationship with Steven if:

A) her cost-benefit ratio is substantially more favorable than Steven's.
B) she perceives that both her and Steven's cost-benefit ratios are currently unfavorable.
C) she feels that a relationship with Steven is the best that she can do.
D) she perceives a less than equitable cost-benefit ratio and they have been married for a long time.