Answer:
a. Culture is shared, relatively stable, and is formed over a long period of time.
Step-by-step explanation:
In sociology, the term culture is used to define the group of values, beliefs and communication that a group of people share and have in common and which has been formed over a long period of time. Considering that is has been formed over a long period of time, culture is also relatively stable (since it is shared by many people it is not that easy to change it).
Therefore, we can conclude that, in general, culture is shared, relatively stable and is formed over a long period of time.