The major cementing factor(s) in maintaining a long-term relationship is (are) a. proximity and physical attractiveness b. similarity c. proximity d. physical attractiveness

The major cementing factor in maintaining a long-term relationship is similarity. In relationships, similarity in various characteristics such as interests and appearance remains important as relationships tend to grow when the individuals develop and maintain the same interests and continue to share their important principles over time.

the answer will be a) proteins i believe

your spelling is a little off : ]