Answer:
d) social clock.
Explanation:
The social clock is defined as a concept or phenomena that tend to explore or figure-out different timetable that is being determined via social structure or culture that is responsible for describing a proper time related to a few specific events, for example, social status, graduation, marriage, and employment, etc. The concept of the social clock was first introduced by a psychologist named Bernice Neugarten during 1965.
Example: In a few cultures, people get married very soon or early in their age whereas in other cultures people marry whenever they think they should marry.
