Answer:they are using an operation in the ACHIEVING stage.
Step-by-step explanation:
According to K. Warner this stage begins around 20 to 30 years of age in which a person has completed their education and they are ready to enter into building their own family or entering the workforce and they feel the influence to use the problem solving skill that they have acquired during acquisition stage in order to establish their individual independence. They use their knowledge to resolve and establish what their long term goals are. In this stage a person has to carefully consider their decisions and be carefully that they use their problem solving skills accurately because what ever decision they take has the long term consequences such as deciding to get married is not a light decision because it impacts the rest of your life.