Final answer:
Without specific lifestyle factors, it's hard to match a definitive likelihood of infidelity to each; the correct answer would likely be 'Cannot be determined'. Lifestyle factors influencing infidelity are varied and complex, including happiness, commitment, and opportunity. Additional information provided includes matched study groups, the perception of family closeness, and increasing median ages of first marriage.
Step-by-step explanation:
To match the likelihood of infidelity among married people to each lifestyle factor presented in the question, it's important to consider a variety of contributing elements. While the question does not provide clear lifestyle factors for matching, general research indicates that certain lifestyle factors may contribute to a greater or lesser likelihood of infidelity. Factors such as personal happiness, quality of marital relationship, societal norms, level of commitment, and opportunities for infidelity could be influential. However, without specific context provided by the information, assigning a definitive likelihood is challenging. Therefore, the correct match to each lifestyle factor could likely be 'd) Cannot be determined' without additional context. Moreover, lifestyle factors themselves are influenced by various dynamics within relationships, making it difficult to generalize the impact of each factor on infidelity.
As for the additional information provided:
- The groups in the study of political opinions (members of married couples) are matched because they consist of specific pairs (husbands and wives).
- Research suggests that people generally feel their current family is 'b) more close' compared to previous generations or other families.
- The median age of first marriage has 'c) increased for both men and women' over recent decades.