Joe's new attitudes wherein he expected his mother to do his laundry and pick up after him when he came home for the summer is most likely a function of conformity.
Conformity is a kind of social influence where a person changes their behavior or belief in order to fit in a group. The change is a response to imaginary or real group pressure.
This is both true and untrue. It's true because knowing the language you can get a job and work in a foreign place and eventually become a naturalized citizen of the place. It is untrue because the person there should also know the customs and culture and not just the language, because lack of knowing these can lead to alienation and depression.
Letter B is the correct answer.
In Sociology, a convergence cluster happens when a group of people (either family or friends) travel together. Thus, a group of friends traveling to New York City for the weekend is a good example of a convergence cluster.