Final answer:
Stonewalling is a behavior destructive to marital happiness, as it closes off communication and can lead to stress and physical health issues. Open disagreements and admitting to being upset, conversely, can be part of healthy conflict resolution.
Step-by-step explanation:
Among the behaviors listed, stonewalling is one that is considered destructive to marital happiness. Stonewalling refers to when one partner withdraws from an interaction, shutting down dialogue and creating emotional distance. This behavior can be problematic as it prevents issues from being resolved through healthy communication. In contrast, open disagreements, while they may be difficult, are a normal aspect of relationships and can lead to better understanding and resolution if handled constructively. Admitting to being very upset over an incident signifies honesty and is part of the process of resolving conflicts. Attracting the problems that cause conflict is not a common term used in relationship dynamics, making it an outlier in this context.
It's noteworthy that negative interactions in relationships, such as stonewalling, lack of emotional support, and lack of reciprocity can be overwhelming and cause substantial stress. This stress can have serious physical consequences, as observed in a study of British civil servants, which linked high levels of negative interactions with a significant increase in the risk of heart problems over a period of 13-15 years.