Answer: Low comparison level
Explanation:
In accordance with relationship, potential cost is the negative values, disliked traits, annoying things whereas rewards are regarded as positive things , attractiveness, good traits etc .
Comparison level is the stage where the cost ,rewards and benefits of present relationship is compared with the earlier relationship.
So according to the situation of Barbara in question, she analyzes that her relationship has more potential cost and less of rewards. This makes her think that usually most relationships face more potential cost and less rewards .
Thus, her comparison level is low as low rewards are present in her relationship and even though she is wishing not to end it with Jaquez.