Final answer:
Option D is correct option. Frankie's gender development will likely be influenced by various family members as family is a key agent in socialization, with parents having different expectations and roles for sons and daughters. His development will include a combination of influences from his father, mother, older brother, and other family dynamics.
Step-by-step explanation:
Frankie, as the second-born son in a family of four, will likely experience various influences on his gender development. According to socialization research, family is the first agent of socialization, and there is substantial evidence that parents socialize sons and daughters differently. Boys like Frankie often learn roles and behaviors through their relationships with other men, who mentor them and model masculine behavior. It is also noted that sons may have greater privileges afforded to them, such as more autonomy and freedom from domestic tasks, compared to daughters.
While Frankie may model some behaviors after his father and possibly his older brother, it's essential to recognize that gender development is a complex process. It can involve a combination of family, cultural, social, and individual factors.
Considering these factors and based on the information provided, the most likely outcome for Frankie's gender development is that it will be a combination of all family members, as each family member contributes differently to the socialization process. Hence, the correct option is D. be a combination of all family members.