Melissa and john have been happily married for 30 years because they have ensured that they have no opportunities to fight. both of them have jobs so they contribute proportionately to the household income, and they equally share all other responsibilities. melissa and john’s happy marriage can best be explained by the

Social exchange theory.

Explanation:

According to my research on studies conducted by various sociologists, I can say that based on the information provided within the question Melissa and John’s happy marriage can best be explained by the Social exchange theory. This theory  basically states that that social behavior of a couple in a relationship is the result of an exchange process in order to maximize benefits and minimize costs.

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because this was the year that the state of israel was formed