Final answer:
The secondary characteristic of culture that is not as influential in socialization is Socioeconomic status (D). Occupation, unlike gender or economic status, involves personal choice and is not as deeply rooted in the initial social context of an individual.
Step-by-step explanation:
The secondary characteristic of culture that does not influence a person's socialization greatly is Socioeconomic status (D). Sociologists consider factors such as gender, ethnicity, and economic status as social characteristics, which describe people in groups and their interactions. However, occupation, as listed in option A, is considered a secondary characteristic of culture as it is not fixed at birth and involves an element of personal choice, unlike the aforementioned social characteristics which are often ascribed at birth or through the social context one is born into.